MIPS: Remove ASSERT since there are tons of different ASSIGN variants

src/mips64/full-codegen-mips64.cc

 // Copyright 2012 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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_MIPS64
 
 // Note on Mips implementation:
 //
@@ skipping 2472 matching lines @@
     __ Branch(&assign, ne, a3, Operand(a4));
     __ li(a3, Operand(var->name()));
     __ push(a3);
     __ CallRuntime(Runtime::kThrowReferenceError, 1);
     // Perform the assignment.
     __ bind(&assign);
     EmitStoreToStackLocalOrContextSlot(var, location);
 
   } else if (!var->is_const_mode() || op == Token::INIT_CONST) {
     if (var->IsLookupSlot()) {
-      ASSERT(op == Token::ASSIGN || op == Token::INIT_VAR ||
-             op == Token::ASSIGN_ADD);
       // Assignment to var.
       __ li(a4, Operand(var->name()));
       __ li(a3, Operand(Smi::FromInt(strict_mode())));
       // jssp[0]  : mode.
       // jssp[8]  : name.
       // jssp[16] : context.
       // jssp[24] : value.
       __ Push(v0, cp, a4, a3);
       __ CallRuntime(Runtime::kStoreLookupSlot, 4);
     } else {
@@ skipping 2352 matching lines @@
       Assembler::target_address_at(pc_immediate_load_address)) ==
          reinterpret_cast<uint64_t>(
              isolate->builtins()->OsrAfterStackCheck()->entry()));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS64