IR: Removes implicit sized add

Saw a few locations in here that we operate things at 64-bit
unconditionally around pointer calculation. Will be coming back for
those when running in 32-bit mode.

This is the last of the implicit sized ALU operations! After this I'll
be going through the IR more individually to try and remove any
stragglers.
Then should be able to start cleaning up and actually optimizing GPR
operations.

FEXCore/include/FEXCore/IR/IREmitter.h

@@ -91,13 +91,6 @@ friend class FEXCore::IR::PassManager;
     return InvalidNode;
   }
 
-  // Temporary naughty implicit IR operation handlers
-  ///< ALU
-  IRPair<IROp_Add> _Add(OrderedNode *_Src1, OrderedNode *_Src2) {
-    return _Add(static_cast<OpSize>(std::max<uint8_t>(4, std::max(GetOpSize(_Src1), GetOpSize(_Src2)))), _Src1, _Src2);
-  }
-  // End of Temporary naughty implicit IR operation handlers
-
   void AddPhiValue(IR::IROp_Phi *Phi, OrderedNode *Value) {
     // Got to do some bookkeeping first
     Value->AddUse();