Software: Remove config to disable ZComploc and ZFreeze

These aren't particularly useful, and make the code a bit more confusing.  If for some reason someone wants to test what happens when these functions are disabled, it's easier to just edit the code that implements them.  They aren't exposed in the UI, so one would need to restart Dolphin to do it anyways.

Source/Core/VideoCommon/VideoConfig.cpp

@@ -97,8 +97,6 @@ void VideoConfig::Refresh()
   iShaderCompilerThreads = Config::Get(Config::GFX_SHADER_COMPILER_THREADS);
   iShaderPrecompilerThreads = Config::Get(Config::GFX_SHADER_PRECOMPILER_THREADS);
 
-  bZComploc = Config::Get(Config::GFX_SW_ZCOMPLOC);
-  bZFreeze = Config::Get(Config::GFX_SW_ZFREEZE);
   bDumpObjects = Config::Get(Config::GFX_SW_DUMP_OBJECTS);
   bDumpTevStages = Config::Get(Config::GFX_SW_DUMP_TEV_STAGES);
   bDumpTevTextureFetches = Config::Get(Config::GFX_SW_DUMP_TEV_TEX_FETCHES);