DebugInfo: remove unused parameter from function. NFC.

I think it's a hold-over from some previous iteration, but it's never
set to true in LLVM as it exists now.

llvm-svn: 293086
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h b/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
index fd90fa0..01f66fa 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfExpression.h
@@ -119,7 +119,7 @@
   /// Emit a dwarf register operation.
   void AddReg(int DwarfReg, const char *Comment = nullptr);
   /// Emit an (double-)indirect dwarf register operation.
-  void AddRegIndirect(int DwarfReg, int Offset, bool Deref = false);
+  void AddRegIndirect(int DwarfReg, int Offset);
 
   /// Emit a DW_OP_piece or DW_OP_bit_piece operation for a variable fragment.
   /// \param OffsetInBits    This is an optional offset into the location that