[macro-assembler] Delete unused LoadGlobalObject

Bug: 
Change-Id: I78403ce3c36f3c8276358f0bafff88131b2c7c00
Reviewed-on: https://chromium-review.googlesource.com/707316Reviewed-by: Camillo Bruni <cbruni@chromium.org>
Commit-Queue: Toon Verwaest <verwaest@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48401}

src/arm/macro-assembler-arm.h

@@ -683,11 +683,6 @@ class MacroAssembler : public TurboAssembler {
                       bool restore_context,
                       bool argument_count_is_length = false);
 
-  // Load the global object from the current context.
-  void LoadGlobalObject(Register dst) {
-    LoadNativeContextSlot(Context::EXTENSION_INDEX, dst);
-  }
-
   // Load the global proxy from the current context.
   void LoadGlobalProxy(Register dst) {
     LoadNativeContextSlot(Context::GLOBAL_PROXY_INDEX, dst);

src/arm64/macro-assembler-arm64.h

@@ -1997,11 +1997,6 @@ class MacroAssembler : public TurboAssembler {
                       const Register& scratch,
                       bool restore_context);
 
-  // Load the global object from the current context.
-  void LoadGlobalObject(Register dst) {
-    LoadNativeContextSlot(Context::EXTENSION_INDEX, dst);
-  }
-
   // Load the global proxy from the current context.
   void LoadGlobalProxy(Register dst) {
     LoadNativeContextSlot(Context::GLOBAL_PROXY_INDEX, dst);

src/mips/macro-assembler-mips.h

@@ -1041,11 +1041,6 @@ class MacroAssembler : public TurboAssembler {
   // Make sure the stack is aligned. Only emits code in debug mode.
   void AssertStackIsAligned();
 
-  // Load the global object from the current context.
-  void LoadGlobalObject(Register dst) {
-    LoadNativeContextSlot(Context::EXTENSION_INDEX, dst);
-  }
-
   // Load the global proxy from the current context.
   void LoadGlobalProxy(Register dst) {
     LoadNativeContextSlot(Context::GLOBAL_PROXY_INDEX, dst);

src/mips64/macro-assembler-mips64.h

@@ -1114,11 +1114,6 @@ class MacroAssembler : public TurboAssembler {
   // Make sure the stack is aligned. Only emits code in debug mode.
   void AssertStackIsAligned();
 
-  // Load the global object from the current context.
-  void LoadGlobalObject(Register dst) {
-    LoadNativeContextSlot(Context::EXTENSION_INDEX, dst);
-  }
-
   // Load the global proxy from the current context.
   void LoadGlobalProxy(Register dst) {
     LoadNativeContextSlot(Context::GLOBAL_PROXY_INDEX, dst);

src/ppc/macro-assembler-ppc.h

@@ -746,11 +746,6 @@ class MacroAssembler : public TurboAssembler {
                       bool restore_context,
                       bool argument_count_is_length = false);
 
-  // Load the global object from the current context.
-  void LoadGlobalObject(Register dst) {
-    LoadNativeContextSlot(Context::EXTENSION_INDEX, dst);
-  }
-
   // Load the global proxy from the current context.
   void LoadGlobalProxy(Register dst) {
     LoadNativeContextSlot(Context::GLOBAL_PROXY_INDEX, dst);

src/s390/macro-assembler-s390.h

@@ -1178,11 +1178,6 @@ class MacroAssembler : public TurboAssembler {
   void EnterBuiltinFrame(Register context, Register target, Register argc);
   void LeaveBuiltinFrame(Register context, Register target, Register argc);
 
-  // Load the global object from the current context.
-  void LoadGlobalObject(Register dst) {
-    LoadNativeContextSlot(Context::EXTENSION_INDEX, dst);
-  }
-
   // Load the global proxy from the current context.
   void LoadGlobalProxy(Register dst) {
     LoadNativeContextSlot(Context::GLOBAL_PROXY_INDEX, dst);