Remove the From<InternedString> for String impl.

nnethercote · nnethercote · commit b74951189d5a · 2019-05-09T14:41:01.000+10:00
It's not used.
diff --git a/src/libsyntax_pos/symbol.rs b/src/libsyntax_pos/symbol.rs
@@ -832,12 +832,6 @@ impl<'a> PartialEq<InternedString> for &'a String {
     }
 }
 
-impl std::convert::From<InternedString> for String {
-    fn from(val: InternedString) -> String {
-        val.as_symbol().to_string()
-    }
-}
-
 impl fmt::Debug for InternedString {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         self.with(|str| fmt::Debug::fmt(&str, f))

Original file line number	Diff line number	Diff line change
`@@ -832,12 +832,6 @@ impl<'a> PartialEq<InternedString> for &'a String {`
`832`	`832`	`}`
`833`	`833`	`}`
`834`	`834`
`835`		`-impl std::convert::From<InternedString> for String {`
`836`		`- fn from(val: InternedString) -> String {`
`837`		`- val.as_symbol().to_string()`
`838`		`- }`
`839`		`-}`
`840`		`-`
`841`	`835`	`impl fmt::Debug for InternedString {`
`842`	`836`	`fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {`
`843`	`837`	`self.with(\|str\| fmt::Debug::fmt(&str, f))`