Auto merge of #59949 - Centril:rollup-lsiqq1g, r=Centril

Rollup of 16 pull requests

Successful merges:

 - #59675 (Stabilize the `alloc` crate.)
 - #59708 (Mark variables captured by reference as mutable correctly)
 - #59735 (remove lookup_char_pos_adj)
 - #59747 (Copy book.toml unstable book generator)
 - #59796 (Retire `IsNotConst` naming)
 - #59804 (Clean up jobserver integration)
 - #59818 (Eliminate `FnBox` usages from libstd.)
 - #59830 (Fix links on keyword docs.)
 - #59835 (Re-export NonZero signed variant in std)
 - #59852 (std: Add `{read,write}_vectored` for more types)
 - #59855 (Fix attributes position in type declaration)
 - #59858 (Make duplicate matcher bindings a hard error)
 - #59899 (In `-Zprint-type-size` output, sort enum variants by size.)
 - #59912 (MaybeUninit: remove deprecated functions)
 - #59925 (Fix paste error in split_ascii_whitespace docs.)
 - #59930 (Exclude some copies of old book editions from search engines)

Failed merges:

r? @ghost

1 files changed, 1 insertions, 12 deletions

diff --git a/src/libsyntax_pos/lib.rs b/src/libsyntax_pos/lib.rs
index db1543ff13f..81cf804cf0b 100644
--- a/src/libsyntax_pos/lib.rs
+++ b/src/libsyntax_pos/lib.rs
@@ -1295,7 +1295,7 @@ impl Sub for CharPos {
 }
 
 // _____________________________________________________________________________
-// Loc, LocWithOpt, SourceFileAndLine, SourceFileAndBytePos
+// Loc, SourceFileAndLine, SourceFileAndBytePos
 //
 
 /// A source code location used for error reporting.
@@ -1311,17 +1311,6 @@ pub struct Loc {
     pub col_display: usize,
 }
 
-/// A source code location used as the result of `lookup_char_pos_adj`.
-// Actually, *none* of the clients use the filename *or* file field;
-// perhaps they should just be removed.
-#[derive(Debug)]
-pub struct LocWithOpt {
-    pub filename: FileName,
-    pub line: usize,
-    pub col: CharPos,
-    pub file: Option<Lrc<SourceFile>>,
-}
-
 // Used to be structural records.
 #[derive(Debug)]
 pub struct SourceFileAndLine { pub sf: Lrc<SourceFile>, pub line: usize }