Revert "Add implicit null and stack checks for x86"

It breaks cross compilation with x86_64.

This reverts commit 34e826ccc80dc1cf7c4c045de6b7f8360d504ccf.

Change-Id: I34ba07821fc0a022fda33a7ae21850957bbec5e7
diff --git a/compiler/dex/quick/arm64/codegen_arm64.h b/compiler/dex/quick/arm64/codegen_arm64.h
index 01d6354..7d75da9 100644
--- a/compiler/dex/quick/arm64/codegen_arm64.h
+++ b/compiler/dex/quick/arm64/codegen_arm64.h
@@ -96,7 +96,7 @@
                               RegStorage r_src, OpSize size) OVERRIDE;
     void MarkGCCard(RegStorage val_reg, RegStorage tgt_addr_reg) OVERRIDE;
     LIR* OpCmpMemImmBranch(ConditionCode cond, RegStorage temp_reg, RegStorage base_reg,
-                           int offset, int check_value, LIR* target, LIR** compare) OVERRIDE;
+                           int offset, int check_value, LIR* target) OVERRIDE;
 
     // Required for target - register utilities.
     RegStorage TargetReg(SpecialTargetRegister reg) OVERRIDE;