Remove enum case list trailing comma support

Author: mateusrodriguesxyz

lib/Parse/ParseDecl.cpp

@@ -9351,10 +9351,6 @@ Parser::parseDeclEnumCase(ParseDeclOptions Flags,
     if (!Tok.is(tok::comma))
       break;
     CommaLoc = consumeToken(tok::comma);
-    if (Context.LangOpts.hasFeature(Feature::TrailingComma) &&
-        (Tok.isAtStartOfLine() || Tok.is(tok::r_brace) || Tok.is(tok::semi))) {
-      break;
-    }
   }
 
   if (!(Flags & PD_AllowEnumElement)) {

test/Parse/trailing-comma.swift

@@ -41,17 +41,6 @@ struct S<T1, T2, T3,> where T1: P1, T2: P2, { }
 
 let _ = { [obj1, obj2,] in }
 
-// Enum Case List
-
-enum E1 {
-    case a, b, c,
-    func foo() { }
-}
-
-enum E2 { case a, b, c, }
-
-enum E3 { case a, b, c, ; func foo() { } }
-
 // Switch Case List
 
 switch number {