[kernel] Remove old unused 'method call' transformer

Change-Id: I20afd79daa0d3668c96d52fcc83c78fb5e3fb4bf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/127620
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Jens Johansen <jensj@google.com>

Author: jensjoha

pkg/kernel/bin/transform.dart

@@ -18,7 +18,6 @@ import 'package:kernel/target/targets.dart';
 
 import 'package:kernel/transformations/continuation.dart' as cont;
 import 'package:kernel/transformations/empty.dart' as empty;
-import 'package:kernel/transformations/method_call.dart' as method_call;
 import 'package:kernel/transformations/mixin_full_resolution.dart' as mix;
 import 'package:kernel/type_environment.dart';
 import 'package:kernel/vm/constants_native_effects.dart';
@@ -104,10 +103,6 @@ Future<CompilerOutcome> runTransformation(List<String> arguments) async {
       component = constants.transformComponent(
           component, backend, defines, const constants.SimpleErrorReporter());
       break;
-    case 'methodcall':
-      component =
-          method_call.transformComponent(coreTypes, hierarchy, component);
-      break;
     case 'empty':
       component = empty.transformComponent(component);
       break;