[turbofan] Remove --turbo-asm-deoptimization flag.

src/isolate.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/isolate.h"
 
 #include <stdlib.h>
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
@@ skipping 1324 matching lines @@
       List<FrameSummary> summaries;
       frame->Summarize(&summaries);
       for (const FrameSummary& summary : summaries) {
         Handle<AbstractCode> code = summary.abstract_code();
         if (code->IsCode() && code->kind() == AbstractCode::BUILTIN &&
             code->GetCode()->is_promise_rejection()) {
           return HandlerTable::PROMISE;
         }
         if (code->kind() == AbstractCode::OPTIMIZED_FUNCTION) {
           DCHECK(summary.function()->shared()->asm_function());
-          DCHECK(!FLAG_turbo_asm_deoptimization);
           // asm code cannot contain try-catch.
           continue;
         }
         // Must have been constructed from a bytecode array.
         CHECK_EQ(AbstractCode::INTERPRETED_FUNCTION, code->kind());
         int code_offset = summary.code_offset();
         BytecodeArray* bytecode = code->GetBytecodeArray();
         HandlerTable* table = HandlerTable::cast(bytecode->handler_table());
         int index = table->LookupRange(code_offset, nullptr, &prediction);
         if (index <= 0) continue;
@@ skipping 2161 matching lines @@
   // Then check whether this scope intercepts.
   if ((flag & intercept_mask_)) {
     intercepted_flags_ |= flag;
     return true;
   }
   return false;
 }
 
 }  // namespace internal
 }  // namespace v8