Revert unrelated expectation changes.

pkg/front_end/testcases/covariant_generic.dart.strong.expect

Index: pkg/front_end/testcases/covariant_generic.dart.strong.expect
diff --git a/pkg/front_end/testcases/covariant_generic.dart.strong.expect b/pkg/front_end/testcases/covariant_generic.dart.strong.expect
index cf4a1f65f6934467af519581892c404445907d9d..1e99fae14bc5db0d02d9df0648da36f9348d5c67 100644
--- a/pkg/front_end/testcases/covariant_generic.dart.strong.expect
+++ b/pkg/front_end/testcases/covariant_generic.dart.strong.expect
@@ -15,6 +15,12 @@ class Foo<T extends core::Object> extends core::Object {
   method withCallback((self::Foo::T) → void callback) → void {
     callback.call(this.{self::Foo::finalField});
   }
+  set mutableField$cc(core::Object mutableField_) → dynamic
+    this.{=self::Foo::mutableField} = mutableField_ as self::Foo::T;
+  method method$cc(core::Object x) → void
+    this.{=self::Foo::method}(x as self::Foo::T);
+  set setter$cc(core::Object x) → void
+    this.{=self::Foo::setter} = x as self::Foo::T;
 }
 static method main() → dynamic {
   self::Foo<core::int> fooInt = new self::Foo::•<core::int>(1, (core::int x) → core::Null {});