Revert "[optimizing] Enable x86 long support."

Few libcore failures.

This reverts commit b4ba354cf8d22b261205494875cc014f18587b50.

Change-Id: I4a28d853e730dff9b69aec9555505803cf2fcd63
diff --git a/compiler/optimizing/ssa_liveness_analysis.h b/compiler/optimizing/ssa_liveness_analysis.h
index 5787f0c..9ff2f20 100644
--- a/compiler/optimizing/ssa_liveness_analysis.h
+++ b/compiler/optimizing/ssa_liveness_analysis.h
@@ -373,17 +373,13 @@
       if (location.IsUnallocated()) {
         if ((location.GetPolicy() == Location::kRequiresRegister)
              || (location.GetPolicy() == Location::kSameAsFirstInput
-                 && (locations->InAt(0).IsRegister()
-                     || locations->InAt(0).IsRegisterPair()
-                     || locations->InAt(0).GetPolicy() == Location::kRequiresRegister))) {
+                 && locations->InAt(0).GetPolicy() == Location::kRequiresRegister)) {
           return position;
         } else if ((location.GetPolicy() == Location::kRequiresFpuRegister)
                    || (location.GetPolicy() == Location::kSameAsFirstInput
                        && locations->InAt(0).GetPolicy() == Location::kRequiresFpuRegister)) {
           return position;
         }
-      } else if (location.IsRegister() || location.IsRegisterPair()) {
-        return position;
       }
     }