[turbofan] Remove deprecated --turbo-from-bytecode flag.

test/mjsunit/regress/regress-5262.js

 // Copyright 2016 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.
 
-// Flags: --ignition --ignition-osr --turbo-from-bytecode --allow-natives-syntax
+// Flags: --ignition --ignition-osr --allow-natives-syntax
 
 function g() { return 23 }
 function h() { return 42 }
 function boom(o) { o.g = h }
 function f(osr_and_recurse) {
   if (osr_and_recurse) {
     for (var i = 0; i < 3; ++i) {
       if (i == 1) %OptimizeOsr();
     }
     %OptimizeFunctionOnNextCall(f);
     f(false);     // Trigger tier-up due to recursive call.
     boom(this);   // Causes a deopt due to below dependency.
     var x = g();  // Install dependency on the {g} function.
     return x;
   }
   return 65;
 }
 assertEquals(65, f(false));
 assertEquals(65, f(false));
 assertEquals(42, f(true));