Revert of [gn] Fix valgrind config

gni/isolate.gni

 # 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.
 
 import("//build/config/sanitizers/sanitizers.gni")
 import("//third_party/icu/config.gni")
 import("v8.gni")
 
 declare_args() {
   # Sets the test isolation mode (noop|prepare|check).
@@ skipping 83 matching lines @@
       if (v8_use_external_startup_data) {
         use_external_startup_data = "1"
       } else {
         use_external_startup_data = "0"
       }
       if (v8_use_snapshot) {
         use_snapshot = "true"
       } else {
         use_snapshot = "false"
       }
-      if (v8_has_valgrind) {
-        has_valgrind = "1"
-      } else {
-        has_valgrind = "0"
-      }
 
       # Note, all paths will be rebased in isolate_driver.py to be relative to
       # the isolate file.
       args = [
         v8_test_isolation_mode,
         "--isolated",
         rebase_path("$root_out_dir/$name.isolated", root_build_dir),
         "--isolate",
         rebase_path(invoker.isolate, root_build_dir),
 
@@ skipping 11 matching lines @@
         "CONFIGURATION_NAME=$configuration_name",
         "--config-variable",
         "OS=$target_os",
         "--config-variable",
         "asan=$asan",
         "--config-variable",
         "cfi_vptr=$cfi_vptr",
         "--config-variable",
         "gcmole=0",
         "--config-variable",
-        "has_valgrind=$has_valgrind",
+        "has_valgrind=0",
         "--config-variable",
         "icu_use_data_file_flag=$icu_use_data_file_flag",
         "--config-variable",
         "msan=$msan",
         "--config-variable",
         "tsan=$tsan",
         "--config-variable",
         "coverage=0",
         "--config-variable",
         "sanitizer_coverage=0",
@@ skipping 16 matching lines @@
         ]
       } else {
         args += [
           "--config-variable",
           "msvs_version=0",
         ]
       }
     }
   }
 }