Drop unnecessary to_string() methods

The methods were shadowing the implementation of the same function via
the Display trait. One implementation is enough.

Found by the clippy trait inherent_to_string_shadow_display:
https://rust-lang.github.io/rust-clippy/master/index.html#inherent_to_string_shadow_display

2 files changed, 0 insertions, 10 deletions

diff --git a/ipc/src/sexp/parse/lexer.rs b/ipc/src/sexp/parse/lexer.rs
index bd641fef..b4eae979 100644
--- a/ipc/src/sexp/parse/lexer.rs
+++ b/ipc/src/sexp/parse/lexer.rs
@@ -54,12 +54,6 @@ impl<'a> From<Token<'a>> for String {
     }
 }
 
-impl<'a> Token<'a> {
-    pub fn to_string(self) -> String {
-        self.into()
-    }
-}
-
 #[derive(Debug)]
 pub(crate) struct Lexer<'input> {
     offset: usize,
diff --git a/openpgp/src/regex/lexer.rs b/openpgp/src/regex/lexer.rs
index ec1344ad..3d6c1e45 100644
--- a/openpgp/src/regex/lexer.rs
+++ b/openpgp/src/regex/lexer.rs
@@ -75,10 +75,6 @@ impl From<Token> for String {
 }
 
 impl Token {
-    pub fn to_string(self) -> String {
-        self.into()
-    }
-
     pub fn to_char(&self) -> char {
         use self::Token::*;
         match self {