Config: Remove Core::DCBZ [bDCBZOFF] - obsolete

This option completely disabled the DCBZ instruction. Users are toggling
this option in dolphin forks and using that same problematic config when
launching dolphin. Removing the option from dolphin will let the config be
ignored.

Source/Core/Core/PowerPC/Interpreter/Interpreter_LoadStore.cpp

@@ -502,11 +502,6 @@ void Interpreter::dcbtst(UGeckoInstruction inst)
 
 void Interpreter::dcbz(UGeckoInstruction inst)
 {
-  // DCBZOFF is a hack to fix certain games which would otherwise require
-  // accurate L2 emulation.
-  if (SConfig::GetInstance().bDCBZOFF)
-    return;
-
   const u32 dcbz_addr = Helper_Get_EA_X(inst);
 
   if (!HID0.DCE)

Source/Core/Core/PowerPC/Jit64/Jit_LoadStore.cpp

@@ -330,8 +330,6 @@ void Jit64::dcbz(UGeckoInstruction inst)
 {
   INSTRUCTION_START
   JITDISABLE(bJITLoadStoreOff);
-  if (SConfig::GetInstance().bDCBZOFF)
-    return;
   FALLBACK_IF(SConfig::GetInstance().bLowDCBZHack);
 
   int a = inst.RA;

Source/Core/Core/PowerPC/JitArm64/JitArm64_LoadStore.cpp

@@ -630,8 +630,6 @@ void JitArm64::dcbz(UGeckoInstruction inst)
 {
   INSTRUCTION_START
   JITDISABLE(bJITLoadStoreOff);
-  if (SConfig::GetInstance().bDCBZOFF)
-    return;
   FALLBACK_IF(jo.memcheck);
   FALLBACK_IF(SConfig::GetInstance().bLowDCBZHack);