android: Remove unused and non-hermetic include dir.

No intended behavior change.

Bug: 1005118
Change-Id: I359a8adfd8d6f5ce5972be10697f2eceadc1a99a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2207581
Commit-Queue: Nico Weber <thakis@chromium.org>
Commit-Queue: Eric Roman <eroman@chromium.org>
Auto-Submit: Nico Weber <thakis@chromium.org>
Reviewed-by: Eric Roman <eroman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#770391}

net/BUILD.gn

@@ -87,10 +87,6 @@ buildflag_header("buildflags") {
 config("net_internal_config") {
   defines = [ "NET_IMPLEMENTATION" ]
 
-  if (use_kerberos && is_android) {
-    include_dirs = [ "/usr/include/kerberosV" ]
-  }
-
   if (enable_built_in_dns) {
     defines += [ "ENABLE_BUILT_IN_DNS" ]
   }