[TableGen] Remove a couple unused methods from Record that take a StringRef argument. NFC

We also have a version that takes an Init* that are used.

llvm-svn: 304521

llvm/include/llvm/TableGen/Record.h

@@ -1361,10 +1361,6 @@ public:
     return false;
   }
 
-  bool isTemplateArg(StringRef Name) const {
-    return isTemplateArg(StringInit::get(Name));
-  }
-
   const RecordVal *getValue(const Init *Name) const {
     for (const RecordVal &Val : Values)
       if (Val.Name == Name) return &Val;
@@ -1388,10 +1384,6 @@ public:
     TemplateArgs.push_back(Name);
   }
 
-  void addTemplateArg(StringRef Name) {
-    addTemplateArg(StringInit::get(Name));
-  }
-
   void addValue(const RecordVal &RV) {
     assert(getValue(RV.getNameInit()) == nullptr && "Value already added!");
     Values.push_back(RV);