Remove unused code from rustc_span

compiler/rustc_span/src/hygiene.rs

@@ -619,14 +619,6 @@ impl SyntaxContext {
         HygieneData::with(|data| data.outer_mark(self))
     }
 
-    #[inline]
-    pub fn outer_mark_with_data(self) -> (ExpnId, Transparency, ExpnData) {
-        HygieneData::with(|data| {
-            let (expn_id, transparency) = data.outer_mark(self);
-            (expn_id, transparency, data.expn_data(expn_id).clone())
-        })
-    }
-
     pub fn dollar_crate_name(self) -> Symbol {
         HygieneData::with(|data| data.syntax_context_data[self.0 as usize].dollar_crate_name)
     }

compiler/rustc_span/src/lib.rs

@@ -223,12 +223,6 @@ impl FileName {
         }
     }
 
-    pub fn quote_expansion_source_code(src: &str) -> FileName {
-        let mut hasher = StableHasher::new();
-        src.hash(&mut hasher);
-        FileName::QuoteExpansion(hasher.finish())
-    }
-
     pub fn macro_expansion_source_code(src: &str) -> FileName {
         let mut hasher = StableHasher::new();
         src.hash(&mut hasher);

compiler/rustc_span/src/source_map.rs

@@ -451,15 +451,6 @@ impl SourceMap {
         }
     }
 
-    /// Returns a new `Span` covering the start and end `BytePos`s of the file containing the given
-    /// `pos`. This can be used to quickly determine if another `BytePos` or `Span` is from the same
-    /// file.
-    pub fn lookup_file_span(&self, pos: BytePos) -> Span {
-        let idx = self.lookup_source_file_idx(pos);
-        let SourceFile { start_pos, end_pos, .. } = *(*self.files.borrow().source_files)[idx];
-        Span::with_root_ctxt(start_pos, end_pos)
-    }
-
     /// Returns `Some(span)`, a union of the LHS and RHS span. The LHS must precede the RHS. If
     /// there are gaps between LHS and RHS, the resulting union will cross these gaps.
     /// For this to work,