[Autobackout][FunctionalRegression]Revert of change: 681e0a5: Bump up GRF mode for forceBCR

When forceBCR is applied, there are a lot of bank conflict. Bump up GRF
    mode to reduce conflict

Author: sys-igc

visa/G4_Kernel.cpp

@@ -2246,10 +2246,6 @@ GRFMode::GRFMode(const TARGET_PLATFORM plat, unsigned regSize, Options *op)
 
   // Select higher GRF
   GRFModeUpValue = op->getuInt32Option(vISA_ForceGRFModeUp);
-
-  if (GRFModeUpValue == 0)
-    GRFModeUpValue = op->getOption(vISA_forceBCR) ? 1 : 0;
-
   vISA_ASSERT(GRFModeUpValue >= 0 && GRFModeUpValue <= configs.size(),
               "Invalid value for selecting a higher GRF mode");
 }