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

tests/language_2/function_type/function_type32_test.dart

Index: tests/language_2/function_type/function_type32_test.dart
diff --git a/tests/language_2/function_type/function_type32_test.dart b/tests/language_2/function_type/function_type32_test.dart
index d2ded1b6b3a7c38817e27edd23e91ac9aa40eaae..6aeea01df54c99c50029d855cd739f9f88c0912b 100644
--- a/tests/language_2/function_type/function_type32_test.dart
+++ b/tests/language_2/function_type/function_type32_test.dart
@@ -294,10 +294,10 @@ class U32<T> {
       });
     }
     if (tIsInt || tIsBool) {
-      Expect.equals(true, m3 is F3<int>);
-      Expect.equals(true, m3 is F3<bool>);
-      Expect.equals(true, confuse(m3) is F3<int>);
-      Expect.equals(true, confuse(m3) is F3<bool>);
+      Expect.equals(tIsInt, m3 is F3<int>);
+      Expect.equals(tIsBool, m3 is F3<bool>);
+      Expect.equals(tIsInt, confuse(m3) is F3<int>);
+      Expect.equals(tIsBool, confuse(m3) is F3<bool>);
     }
   }