[MC] Remove unneeded onLabelParsed and onLabelParsed from HLASM

They are only used by ARM and wasm.

Author: MaskRay

llvm/lib/MC/MCParser/AsmParser.cpp

@@ -6324,8 +6324,6 @@ bool HLASMAsmParser::parseAsHLASMLabel(ParseStatementInfo &Info,
   MCSymbol *Sym = getContext().getOrCreateSymbol(
       getContext().getAsmInfo()->isHLASM() ? LabelVal.upper() : LabelVal);
 
-  getTargetParser().doBeforeLabelEmit(Sym, LabelLoc);
-
   // Emit the label.
   Out.emitLabel(Sym, LabelLoc);
 
@@ -6335,8 +6333,6 @@ bool HLASMAsmParser::parseAsHLASMLabel(ParseStatementInfo &Info,
     MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
                                LabelLoc);
 
-  getTargetParser().onLabelParsed(Sym);
-
   return false;
 }