Remove an unnecessary local variable.

nnethercote · nnethercote · commit 95be8b21896c · 2023-12-02T08:58:25.000+11:00
diff --git a/compiler/rustc_errors/src/lib.rs b/compiler/rustc_errors/src/lib.rs
@@ -1055,8 +1055,7 @@ impl Handler {
 
     #[rustc_lint_diagnostics]
     pub fn warn(&self, msg: impl Into<DiagnosticMessage>) {
-        let mut db = DiagnosticBuilder::new(self, Warning(None), msg);
-        db.emit();
+        DiagnosticBuilder::new(self, Warning(None), msg).emit();
     }
 
     #[rustc_lint_diagnostics]

Original file line number	Diff line number	Diff line change
`@@ -1055,8 +1055,7 @@ impl Handler {`
`1055`	`1055`
`1056`	`1056`	`#[rustc_lint_diagnostics]`
`1057`	`1057`	`pub fn warn(&self, msg: impl Into<DiagnosticMessage>) {`
`1058`		`- let mut db = DiagnosticBuilder::new(self, Warning(None), msg);`
`1059`		`- db.emit();`
	`1058`	`+ DiagnosticBuilder::new(self, Warning(None), msg).emit();`
`1060`	`1059`	`}`
`1061`	`1060`
`1062`	`1061`	`#[rustc_lint_diagnostics]`