Revert 232280 "Linux: add a Credentials class to handle Linux ca..."

trunk/src/sandbox/linux/sandbox_linux_test_sources.gypi

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Tests need to be compiled in the same link unit, so we have to list them
 # in a separate .gypi file.
 {
   'dependencies': [
     'sandbox',
     '../base/base.gyp:base',
@@ skipping 17 matching lines @@
     [ 'compile_seccomp_bpf==1', {
       'sources': [
         'seccomp-bpf/bpf_tests.h',
         'seccomp-bpf/codegen_unittest.cc',
         'seccomp-bpf/errorcode_unittest.cc',
         'seccomp-bpf/sandbox_bpf_unittest.cc',
         'seccomp-bpf/syscall_iterator_unittest.cc',
         'seccomp-bpf/syscall_unittest.cc',
       ],
     }],
-    [ 'compile_credentials==1', {
-      'sources': [
-        'services/credentials_unittest.cc',
-      ],
-    }],
   ],
 }