Don't print name of EnumDecl if there is none

The function overload without PrintingPolicy is not available in
LLVM 16, see https://reviews.llvm.org/D134813.

lib/Interpreter/ForwardDeclPrinter.cpp

@@ -1364,7 +1364,6 @@ namespace cling {
 
   bool ForwardDeclPrinter::shouldSkipImpl(EnumDecl *D) {
     if (!D->getIdentifier()){
-      D->printName(Log());
       Log() << "Enum: Empty name\n";
       return true;
     }