Revert "Add extension traits for handling Result<Option<T>, E> conversion"

This reverts commit d810b63886f4006d01bca894982bbc867616f37c.

As resiter v0.4.0 does provide this extension now, we don't need it in
the codebase anymore.

3 files changed, 0 insertions, 85 deletions

diff --git a/lib/core/libimagerror/src/iter.rs b/lib/core/libimagerror/src/iter.rs
index 1e7dbff9..5a288321 100644
--- a/lib/core/libimagerror/src/iter.rs
+++ b/lib/core/libimagerror/src/iter.rs
@@ -128,49 +128,3 @@ impl<I, T> TraceIterator<T> for I where
     I: Iterator<Item = Result<T, Error>>
 {}
 
-
-/// Extension trait for doing
-///
-/// ```ignore
-///     Iterator<Item = Result<Option<T>, E>>  ->  Iterator<Item = Result<T, E>>
-/// ```
-///
-pub trait IterInnerOkOrElse<T, E, F>
-    where T: Sized,
-          E: Sized,
-          Self: Iterator<Item = Result<Option<T>, E>> + Sized,
-          F: Fn() -> E,
-{
-    fn map_inner_ok_or_else(self, f: F) -> IterInnerOkOrElseImpl<Self, T, E, F>;
-}
-
-pub struct IterInnerOkOrElseImpl<I, T, E, F>(I, F)
-    where I: Iterator<Item = Result<Option<T>, E>> + Sized,
-          T: Sized,
-          E: Sized,
-          F: Fn() -> E;
-
-impl<I, T, E, F> IterInnerOkOrElse<T, E, F> for I
-    where I: Iterator<Item = Result<Option<T>, E>> + Sized,
-          T: Sized,
-          E: Sized,
-          F: Fn() -> E,
-{
-    fn map_inner_ok_or_else(self, f: F) -> IterInnerOkOrElseImpl<I, T, E, F> {
-        IterInnerOkOrElseImpl(self, f)
-    }
-}
-
-impl<I, T, E, F> Iterator for IterInnerOkOrElseImpl<I, T, E, F>
-    where I: Iterator<Item = Result<Option<T>, E>> + Sized,
-          T: Sized,
-          E: Sized,
-          F: Fn() -> E,
-{
-    type Item = Result<T, E>;
-
-    fn next(&mut self) -> Option<Self::Item> {
-        self.0.next().map(|e| e.and_then(|opt| opt.ok_or_else(|| (self.1)())))
-    }
-}
-
diff --git a/lib/core/libimagerror/src/lib.rs b/lib/core/libimagerror/src/lib.rs
index 9b5e8407..22391142 100644
--- a/lib/core/libimagerror/src/lib.rs
+++ b/lib/core/libimagerror/src/lib.rs
@@ -44,7 +44,6 @@ pub mod errors;
 pub mod exit;
 pub mod io;
 pub mod iter;
-pub mod result;
 pub mod str;
 pub mod trace;
 
diff --git a/lib/core/libimagerror/src/result.rs b/lib/core/libimagerror/src/result.rs
deleted file mode 100644
index 0dcb5333..00000000
--- a/lib/core/libimagerror/src/result.rs
+++ /dev/null
@@ -1,38 +0,0 @@
-//
-// imag - the personal information management suite for the commandline
-// Copyright (C) 2015-2019 the imag contributors
-//
-// This library is free software; you can redistribute it and/or
-// modify it under the terms of the GNU Lesser General Public
-// License as published by the Free Software Foundation; version
-// 2.1 of the License.
-//
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-// Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public
-// License along with this library; if not, write to the Free Software
-// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
-//
-
-/// Extension trait for doing `Result<Option<T>, E>  ->  Result<T, E>`
-pub trait ResultOptionExt<T, E, F>
-    where T: Sized,
-          E: Sized,
-          F: FnOnce() -> E
-{
-    fn inner_ok_or_else(self, f: F) -> Result<T, E>;
-}
-
-impl<T, E, F> ResultOptionExt<T, E, F> for Result<Option<T>, E>
-    where T: Sized,
-          E: Sized,
-          F: FnOnce() -> E
-{
-    fn inner_ok_or_else(self, f: F) -> Result<T, E> {
-        self.and_then(|opt| opt.ok_or_else(f))
-    }
-}
-