Remove unused VariableLocation::GLOBAL.

src/full-codegen/arm64/full-codegen-arm64.cc

Index: src/full-codegen/arm64/full-codegen-arm64.cc
diff --git a/src/full-codegen/arm64/full-codegen-arm64.cc b/src/full-codegen/arm64/full-codegen-arm64.cc
index 06c381d96c4a7666aa58ddf2b4a02982aec557e0..ab055fde7dd2290af9416e68004ab660a0dc72b7 100644
--- a/src/full-codegen/arm64/full-codegen-arm64.cc
+++ b/src/full-codegen/arm64/full-codegen-arm64.cc
@@ -761,7 +761,6 @@ void FullCodeGenerator::VisitVariableDeclaration(
   VariableProxy* proxy = declaration->proxy();
   Variable* variable = proxy->var();
   switch (variable->location()) {
-    case VariableLocation::GLOBAL:
     case VariableLocation::UNALLOCATED: {
       DCHECK(!variable->binding_needs_init());
       FeedbackVectorSlot slot = proxy->VariableFeedbackSlot();
@@ -812,7 +811,6 @@ void FullCodeGenerator::VisitFunctionDeclaration(
   VariableProxy* proxy = declaration->proxy();
   Variable* variable = proxy->var();
   switch (variable->location()) {
-    case VariableLocation::GLOBAL:
     case VariableLocation::UNALLOCATED: {
       FeedbackVectorSlot slot = proxy->VariableFeedbackSlot();
       DCHECK(!slot.IsInvalid());
@@ -1275,7 +1273,6 @@ void FullCodeGenerator::EmitVariableLoad(VariableProxy* proxy,
   // Three cases: global variables, lookup variables, and all other types of
   // variables.
   switch (var->location()) {
-    case VariableLocation::GLOBAL:
     case VariableLocation::UNALLOCATED: {
       Comment cmnt(masm_, "Global variable");
       EmitGlobalVariableLoad(proxy, typeof_mode);