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

tests/language_2/function_type/function_type60_test.dart

Index: tests/language_2/function_type/function_type60_test.dart
diff --git a/tests/language_2/function_type/function_type60_test.dart b/tests/language_2/function_type/function_type60_test.dart
index 1a897b269df81431aecd8a6e1a24699666d66a6d..5b23ba9f94735ef283fecd65c35d1e3ada1b7451 100644
--- a/tests/language_2/function_type/function_type60_test.dart
+++ b/tests/language_2/function_type/function_type60_test.dart
@@ -216,10 +216,10 @@ class U60<T> {
       });
     }
     if (tIsInt || tIsBool) {
-      Expect.equals(true, m1 is F1<int>);
-      Expect.equals(true, m1 is F1<bool>);
-      Expect.equals(true, confuse(m1) is F1<int>);
-      Expect.equals(true, confuse(m1) is F1<bool>);
+      Expect.equals(tIsInt, m1 is F1<int>);
+      Expect.equals(tIsBool, m1 is F1<bool>);
+      Expect.equals(tIsInt, confuse(m1) is F1<int>);
+      Expect.equals(tIsBool, confuse(m1) is F1<bool>);
     }
   }
 
@@ -338,10 +338,10 @@ class U60<T> {
       });
     }
     if (tIsInt || tIsBool) {
-      Expect.equals(true, m4 is F4<int>);
-      Expect.equals(true, m4 is F4<bool>);
-      Expect.equals(true, confuse(m4) is F4<int>);
-      Expect.equals(true, confuse(m4) is F4<bool>);
+      Expect.equals(tIsInt, m4 is F4<int>);
+      Expect.equals(tIsBool, m4 is F4<bool>);
+      Expect.equals(tIsInt, confuse(m4) is F4<int>);
+      Expect.equals(tIsBool, confuse(m4) is F4<bool>);
     }
   }