allocator cleanup: remove dependencies on allocator from all targets

ash/BUILD.gn

Index: ash/BUILD.gn
diff --git a/ash/BUILD.gn b/ash/BUILD.gn
index 25a26915d864cd80051ff246f8d4cde907a0c548..ced0d8b07737de88e276f87230d518e2fb3c5bc4 100644
--- a/ash/BUILD.gn
+++ b/ash/BUILD.gn
@@ -289,7 +289,6 @@ test("ash_unittests") {
     "//ash/resources",
     "//ash/strings",
     "//base",
-    "//base/allocator",
     "//base/test:test_support",
     "//components/signin/core/account_id",
     "//components/user_manager",
@@ -378,10 +377,6 @@ test("ash_unittests") {
     sources -= [ "touch/touch_transformer_controller_unittest.cc" ]
   }
 
-  # TODO(GYP) is this necessary?
-  #['OS=="linux" and component=="shared_library" and use_allocator!="none"', {
-  # ldflags = "-rdynamic"
-
   if (!is_chromeos) {
     sources -= [ "sticky_keys/sticky_keys_unittest.cc" ]
   }