Remove no_size_t_to_int_warning in //crypto

Bug: 167187
Change-Id: Ied2e32a24a87f366c47ef6d10f136126dea040ef
Reviewed-on: https://chromium-review.googlesource.com/c/1393329Reviewed-by: David Benjamin <davidben@chromium.org>
Commit-Queue: David Benjamin <davidben@chromium.org>
Cr-Commit-Position: refs/heads/master@{#619495}

crypto/BUILD.gn

@@ -69,9 +69,6 @@ component("crypto") {
     "symmetric_key.h",
   ]
 
-  # TODO(jschuh): crbug.com/167187 fix size_t to int truncations.
-  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
-
   deps = [
     ":platform",
     "//base",
@@ -154,8 +151,6 @@ test("crypto_unittests") {
     ]
   }
 
-  configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]
-
   deps = [
     ":crypto",
     ":platform",