Remove late ARM codegen optimization pass committed by accident.
It is not ready for public yet.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@100673 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMTargetMachine.cpp b/lib/Target/ARM/ARMTargetMachine.cpp
index f769702..662e61e 100644
--- a/lib/Target/ARM/ARMTargetMachine.cpp
+++ b/lib/Target/ARM/ARMTargetMachine.cpp
@@ -79,15 +79,9 @@
     TLInfo(*this) {
 }
 
+
+
 // Pass Pipeline Configuration
-bool ARMBaseTargetMachine::addPreISel(PassManagerBase &PM,
-                                      CodeGenOpt::Level OptLevel) {
-  if (OptLevel != CodeGenOpt::None)
-    PM.add(createARMGlobalMergePass(getTargetLowering()));
-
-  return false;
-}
-
 bool ARMBaseTargetMachine::addInstSelector(PassManagerBase &PM,
                                            CodeGenOpt::Level OptLevel) {
   PM.add(createARMISelDag(*this, OptLevel));