Remove no_size_t_to_int_warning in //apps

Bug: 167187
Change-Id: I9f1b4b3a9dbd63be2a950e9277d08d406f525a40
Reviewed-on: https://chromium-review.googlesource.com/c/1392180Reviewed-by: Matt Giuca <mgiuca@chromium.org>
Commit-Queue: Victor Costan <pwnall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619368}

apps/BUILD.gn

@@ -48,9 +48,6 @@ static_library("apps") {
   if (is_chromeos) {
     deps += [ "//components/user_manager" ]
   }
-
-  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
 }
 
 static_library("test_support") {