Removing code for tlbia

Seems to be causing a regression in Mac OS X 10.0

Author: dingusdev

cpu/ppc/ppcopcodes.cpp

@@ -2018,12 +2018,6 @@ void dppc_interpreter::ppc_tlbia(uint32_t opcode) {
     num_supervisor_instrs++;
 #endif
     /* placeholder */
-    if (ppc_state.msr & MSR::PR) {
-        ppc_exception_handler(Except_Type::EXC_PROGRAM, Exc_Cause::NOT_ALLOWED);
-        return;
-    }
-
-    LOG_F(ERROR, "tlbia needs to be implemented!");
 }
 
 void dppc_interpreter::ppc_tlbld(uint32_t opcode) {