Rollup merge of #77739 - est31:remove_unused_code, r=petrochenkov,varkor

Remove unused code

Rustc has a builtin lint for detecting unused code inside a crate, but when an item is marked `pub`, the code, even if unused inside the entire workspace, is never marked as such. Therefore, I've built [warnalyzer](https://github.com/est31/warnalyzer) to detect unused items in a cross-crate setting.

Closes https://github.com/est31/warnalyzer/issues/2

1 files changed, 0 insertions, 16 deletions

diff --git a/compiler/rustc_parse/src/lib.rs b/compiler/rustc_parse/src/lib.rs
index cceaa08daa4..25deb46e147 100644
--- a/compiler/rustc_parse/src/lib.rs
+++ b/compiler/rustc_parse/src/lib.rs
@@ -114,16 +114,6 @@ pub fn new_parser_from_file<'a>(sess: &'a ParseSess, path: &Path, sp: Option<Spa
     source_file_to_parser(sess, file_to_source_file(sess, path, sp))
 }
 
-/// Creates a new parser, returning buffered diagnostics if the file doesn't exist,
-/// or from lexing the initial token stream.
-pub fn maybe_new_parser_from_file<'a>(
-    sess: &'a ParseSess,
-    path: &Path,
-) -> Result<Parser<'a>, Vec<Diagnostic>> {
-    let file = try_file_to_source_file(sess, path, None).map_err(|db| vec![db])?;
-    maybe_source_file_to_parser(sess, file)
-}
-
 /// Given a `source_file` and config, returns a parser.
 fn source_file_to_parser(sess: &ParseSess, source_file: Lrc<SourceFile>) -> Parser<'_> {
     panictry_buffer!(&sess.span_diagnostic, maybe_source_file_to_parser(sess, source_file))
@@ -146,12 +136,6 @@ fn maybe_source_file_to_parser(
     Ok(parser)
 }
 
-// Must preserve old name for now, because `quote!` from the *existing*
-// compiler expands into it.
-pub fn new_parser_from_tts(sess: &ParseSess, tts: Vec<TokenTree>) -> Parser<'_> {
-    stream_to_parser(sess, tts.into_iter().collect(), crate::MACRO_ARGUMENTS)
-}
-
 // Base abstractions
 
 /// Given a session and a path and an optional span (for error reporting),