Revert "Add support for generic function type syntax, part 1" (TBR)

pkg/analysis_server/lib/src/computer/computer_highlights2.dart

Index: pkg/analysis_server/lib/src/computer/computer_highlights2.dart
diff --git a/pkg/analysis_server/lib/src/computer/computer_highlights2.dart b/pkg/analysis_server/lib/src/computer/computer_highlights2.dart
index 184c35dc1639c8c6522f3ea58faaa3cb9670d004..630b41fd6d2f7d3fcdf7b51b7fe47c1a8e0cb3dc 100644
--- a/pkg/analysis_server/lib/src/computer/computer_highlights2.dart
+++ b/pkg/analysis_server/lib/src/computer/computer_highlights2.dart
@@ -591,19 +591,6 @@ class _DartUnitHighlightsComputerVisitor2 extends RecursiveAstVisitor<Object> {
   }
 
   @override
-  Object visitGenericFunctionType(GenericFunctionType node) {
-    computer._addRegion_token(
-        node.functionKeyword, HighlightRegionType.KEYWORD);
-    return super.visitGenericFunctionType(node);
-  }
-
-  @override
-  Object visitGenericTypeAlias(GenericTypeAlias node) {
-    computer._addRegion_token(node.typedefKeyword, HighlightRegionType.KEYWORD);
-    return super.visitGenericTypeAlias(node);
-  }
-
-  @override
   Object visitHideCombinator(HideCombinator node) {
     computer._addRegion_token(node.keyword, HighlightRegionType.BUILT_IN);
     return super.visitHideCombinator(node);