Revert "Issue 27300. Report HintCode.ABSTRACT_SUPER_MEMBER_REFERENCE."

pkg/analyzer/lib/src/error/codes.dart

Index: pkg/analyzer/lib/src/error/codes.dart
diff --git a/pkg/analyzer/lib/src/error/codes.dart b/pkg/analyzer/lib/src/error/codes.dart
index 06d6ae3d7af7a926896acd173100560f907773d6..227ef736980364649aea885478729dc7099fe5f9 100644
--- a/pkg/analyzer/lib/src/error/codes.dart
+++ b/pkg/analyzer/lib/src/error/codes.dart
@@ -2204,19 +2204,6 @@ class CompileTimeErrorCode extends ErrorCode {
  */
 class HintCode extends ErrorCode {
   /**
-   * When an abstract supertype member is references with `super` as its target,
-   * it cannot be overridden, so it is always a runtime error.
-   *
-   * Parameters:
-   * 0: the display name for the kind of the referenced element
-   * 1: the name of the referenced element
-   */
-  static const HintCode ABSTRACT_SUPER_MEMBER_REFERENCE = const HintCode(
-      'ABSTRACT_SUPER_MEMBER_REFERENCE',
-      "The {0} '{1}' is always abstract in the supertype.",
-      null);
-
-  /**
    * This hint is generated anywhere where the
    * [StaticWarningCode.ARGUMENT_TYPE_NOT_ASSIGNABLE] would have been generated,
    * if we used propagated information for the warnings.