cleanup: remove leftover extra block

This was needed in an older version of this patch, but never got edited
out when it became obsolete.

compiler/rustc_codegen_llvm/src/back/write.rs

@@ -745,15 +745,13 @@ pub(crate) unsafe fn codegen(
  }
 
  if config.emit_bc || config.emit_obj == EmitObj::Bitcode {
- {
  let _timer = cgcx.prof.generic_activity_with_arg(
  "LLVM_module_codegen_emit_bitcode",
  &*module.name,
  );
  if let Err(err) = fs::write(&bc_out, data) {
  dcx.emit_err(WriteBytecode { path: &bc_out, err });
  }
- }
  }
 
  if config.emit_obj == EmitObj::ObjectCode(BitcodeSection::Full) {