runtime: Remove fallback :CompilerSet definition from compiler plugins

The :CompilerSet command was added in version Vim 6.4 which was released
twenty years ago.  Other runtime files do not support versions of that
vintage so it is reasonable to remove this fallback command definition
now.

closes: #14399

Signed-off-by: Doug Kearns <dougkearns@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>

105 files changed, 116 insertions, 444 deletions

diff --git a/runtime/compiler/ant.vim b/runtime/compiler/ant.vim
index 0605c69fab..6219b01c36 100644
--- a/runtime/compiler/ant.vim
+++ b/runtime/compiler/ant.vim
@@ -2,16 +2,13 @@
 " Compiler:	ant
 " Maintainer:	Johannes Zellner <johannes@zellner.org>
 " Last Change:	Mi, 13 Apr 2005 22:50:07 CEST
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
     finish
 endif
 let current_compiler = "ant"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/bcc.vim b/runtime/compiler/bcc.vim
index 5bd284a581..2d9d4fbb36 100644
--- a/runtime/compiler/bcc.vim
+++ b/runtime/compiler/bcc.vim
@@ -2,16 +2,13 @@
 " Compiler:		bcc - Borland C
 " Maintainer:	Emile van Raaij (eraaij@xs4all.nl)
 " Last Change:	2004 Mar 27
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "bcc"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 " A workable errorformat for Borland C
 CompilerSet errorformat=%*[^0-9]%n\ %f\ %l:\ %m
 
diff --git a/runtime/compiler/bdf.vim b/runtime/compiler/bdf.vim
index 7e08cdddaa..2aaa93bc27 100644
--- a/runtime/compiler/bdf.vim
+++ b/runtime/compiler/bdf.vim
@@ -3,6 +3,7 @@
 " Previous Maintainer:  Nikolai Weibull <now@bitwi.se>
 " Contributors:         Enno Nagel
 " Last Change:          2024 Mar 29
+"                       2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
@@ -12,10 +13,6 @@ let current_compiler = "bdf"
 let s:cpo_save = &cpo
 set cpo-=C
 
-if exists(":CompilerSet") != 2 " Older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=bdftopcf\ $*
 CompilerSet errorformat=%ABDF\ %trror\ on\ line\ %l:\ %m,
       \%-Z%p^,
diff --git a/runtime/compiler/cargo.vim b/runtime/compiler/cargo.vim
index aa9b01e93c..cae2e517e3 100644
--- a/runtime/compiler/cargo.vim
+++ b/runtime/compiler/cargo.vim
@@ -2,6 +2,7 @@
 " Compiler:         Cargo Compiler
 " Maintainer:       Damien Radtke <damienradtke@gmail.com>
 " Latest Revision:  2023-09-11
+"                   2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 " For bugs, patches and license go to https://github.com/rust-lang/rust.vim
 
 if exists('current_compiler')
diff --git a/runtime/compiler/checkstyle.vim b/runtime/compiler/checkstyle.vim
index 4ebd9e15b5..3c17ee45bf 100644
--- a/runtime/compiler/checkstyle.vim
+++ b/runtime/compiler/checkstyle.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Checkstyle
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2020 Aug 2
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "checkstyle"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/cm3.vim b/runtime/compiler/cm3.vim
index 3de51282e6..0ec360855c 100644
--- a/runtime/compiler/cm3.vim
+++ b/runtime/compiler/cm3.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Critical Mass Modula-3 Compiler
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2021 Apr 08
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "cm3"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/context.vim b/runtime/compiler/context.vim
index 512f81cbed..093943e22d 100644
--- a/runtime/compiler/context.vim
+++ b/runtime/compiler/context.vim
@@ -5,6 +5,7 @@ vim9script
 # Former Maintainers: Nikolai Weibull <now@bitwi.se>
 # Contributors:       Enno Nagel
 # Last Change:        2024 Mar 29
+#                     2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("g:current_compiler")
   finish
@@ -12,10 +13,6 @@ endif
 
 import autoload '../autoload/context.vim'
 
-if exists(":CompilerSet") != 2 # Older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 g:current_compiler = 'context'
 
 if get(b:, 'context_ignore_makefile', get(g:, 'context_ignore_makefile', 0)) ||
diff --git a/runtime/compiler/cs.vim b/runtime/compiler/cs.vim
index 4f6dd3cdfd..123dff854f 100644
--- a/runtime/compiler/cs.vim
+++ b/runtime/compiler/cs.vim
@@ -3,6 +3,7 @@
 " Maintainer:             Yichao Zhou (broken.zhou@gmail.com)
 " Previous Maintainer:    Joseph H. Yao (hyao@sina.com)
 " Last Change:            Jul 22, 2019
+"                         2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
@@ -11,10 +12,6 @@ let current_compiler = "cs"
 let s:keepcpo= &cpo
 set cpo&vim
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet errorformat&
 CompilerSet errorformat+=%f(%l\\,%v):\ %t%*[^:]:\ %m,
             \%trror%*[^:]:\ %m,
diff --git a/runtime/compiler/csslint.vim b/runtime/compiler/csslint.vim
index 14c4289a24..608cc74864 100644
--- a/runtime/compiler/csslint.vim
+++ b/runtime/compiler/csslint.vim
@@ -1,16 +1,13 @@
 " Vim compiler file
 " Compiler:	csslint for CSS
-" Maintainer: Daniel Moch <daniel@danielmoch.com>
-" Last Change: 2016 May 21
+" Maintainer:	Daniel Moch <daniel@danielmoch.com>
+" Last Change:	2016 May 21
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "csslint"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 CompilerSet makeprg=csslint\ --format=compact
 CompilerSet errorformat=%-G,%-G%f:\ lint\ free!,%f:\ line\ %l\\,\ col\ %c\\,\ %trror\ -\ %m,%f:\ line\ %l\\,\ col\ %c\\,\ %tarning\ -\ %m,%f:\ line\ %l\\,\ col\ %c\\,\ %m
diff --git a/runtime/compiler/cucumber.vim b/runtime/compiler/cucumber.vim
index 17ce3627c1..8089a5ee5c 100644
--- a/runtime/compiler/cucumber.vim
+++ b/runtime/compiler/cucumber.vim
@@ -2,16 +2,13 @@
 " Compiler:	Cucumber
 " Maintainer:	Tim Pope <vimNOSPAM@tpope.org>
 " Last Change:	2016 Aug 29
+"		2024 Apr 03 by The Vim Project (removed :CompilerSet definition)
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "cucumber"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo-=C
 
diff --git a/runtime/compiler/dart.vim b/runtime/compiler/dart.vim
index f9ebfe1b27..9577236bee 100644
--- a/runtime/compiler/dart.vim
+++ b/runtime/compiler/dart.vim
@@ -1,17 +1,13 @@
 " Vim compiler file
 " Compiler:	Dart VM
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2019 May 08
+" Last Change:	2024 Apr 03
 
 if exists("current_compiler")
   finish
 endif
 let current_compiler = "dart"
 
-if exists(":CompilerSet") != 2		" older Vim always used :setlocal
-  command -nargs=* CompilerSet setlocal <args>
-endif
-
 let s:cpo_save = &cpo
 set cpo&vim
 
diff --git a/runtime/compiler/dart2js.vim b/runtime/compiler/dart2js.vim
index b6a4e4d530..a05dead2a9 100644
--- a/