llvm-mc: Simplify EmitAssignment ('.set' is identical to '=').

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80577 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-mc/AsmParser.h b/tools/llvm-mc/AsmParser.h
index fda79ca..7471a90 100644
--- a/tools/llvm-mc/AsmParser.h
+++ b/tools/llvm-mc/AsmParser.h
@@ -94,7 +94,7 @@
                                           SMLoc DirectiveLoc);
   void EatToEndOfStatement();
   
-  bool ParseAssignment(const StringRef &Name, bool IsDotSet);
+  bool ParseAssignment(const StringRef &Name);
 
   bool ParsePrimaryExpr(const MCExpr *&Res);
   bool ParseBinOpRHS(unsigned Precedence, const MCExpr *&Res);