Revert "fix #30462, update function_type tests to understand covariant generics"

tests/language_2/function_type/function_type22_test.dart

Index: tests/language_2/function_type/function_type22_test.dart
diff --git a/tests/language_2/function_type/function_type22_test.dart b/tests/language_2/function_type/function_type22_test.dart
index 48b6b511e07a759cab9466fb75227862704ce2e3..c3ef4799863fb22c960bf4a87cb2f5a7271c18a4 100644
--- a/tests/language_2/function_type/function_type22_test.dart
+++ b/tests/language_2/function_type/function_type22_test.dart
@@ -269,10 +269,10 @@ class U22<T> {
       });
     }
     if (tIsInt || tIsBool) {
-      Expect.equals(true, m2 is F2<int>);
-      Expect.equals(true, m2 is F2<bool>);
-      Expect.equals(true, confuse(m2) is F2<int>);
-      Expect.equals(true, confuse(m2) is F2<bool>);
+      Expect.equals(tIsInt, m2 is F2<int>);
+      Expect.equals(tIsBool, m2 is F2<bool>);
+      Expect.equals(tIsInt, confuse(m2) is F2<int>);
+      Expect.equals(tIsBool, confuse(m2) is F2<bool>);
     }
   }