Remove some leftovers of full-codegen's generators implementation.

src/full-codegen/s390/full-codegen-s390.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_S390
 
 #include "src/full-codegen/full-codegen.h"
 #include "src/ast/compile-time-value.h"
 #include "src/ast/scopes.h"
 #include "src/code-factory.h"
@@ skipping 133 matching lines @@
     __ AddSmiLiteral(r1, r1, Smi::FromInt(1), r0);
     __ StoreP(r1,
               FieldMemOperand(
                   r6, TypeFeedbackVector::kInvocationCountIndex * kPointerSize +
                           TypeFeedbackVector::kHeaderSize));
   }
 
   {
     Comment cmnt(masm_, "[ Allocate locals");
     int locals_count = info->scope()->num_stack_slots();
-    // Generators allocate locals, if any, in context slots.
-    DCHECK(!IsGeneratorFunction(info->literal()->kind()) || locals_count == 0);
     OperandStackDepthIncrement(locals_count);
     if (locals_count > 0) {
       if (locals_count >= 128) {
         Label ok;
         __ AddP(ip, sp, Operand(-(locals_count * kPointerSize)));
         __ LoadRoot(r5, Heap::kRealStackLimitRootIndex);
         __ CmpLogicalP(ip, r5);
         __ bge(&ok, Label::kNear);
         __ CallRuntime(Runtime::kThrowStackOverflow);
         __ bind(&ok);
@@ skipping 3334 matching lines @@
   DCHECK(kOSRBranchInstruction == br_instr);
 
   DCHECK(interrupt_address ==
          isolate->builtins()->OnStackReplacement()->entry());
   return ON_STACK_REPLACEMENT;
 }
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_TARGET_ARCH_S390