sandbox/linux/bpf_dsl: remove ErrorCode intermediary representation

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',
     'sandbox_linux_test_utils',
@@ skipping 27 matching lines @@
         'suid/client/setuid_sandbox_host_unittest.cc',
       ],
     }],
     [ 'use_seccomp_bpf==1', {
       'sources': [
         'bpf_dsl/bpf_dsl_unittest.cc',
         'bpf_dsl/codegen_unittest.cc',
         'bpf_dsl/cons_unittest.cc',
         'bpf_dsl/dump_bpf.cc',
         'bpf_dsl/dump_bpf.h',
-        'bpf_dsl/errorcode_unittest.cc',
         'bpf_dsl/syscall_set_unittest.cc',
         'bpf_dsl/test_trap_registry.cc',
         'bpf_dsl/test_trap_registry.h',
         'bpf_dsl/test_trap_registry_unittest.cc',
         'bpf_dsl/verifier.cc',
         'bpf_dsl/verifier.h',
         'integration_tests/bpf_dsl_seccomp_unittest.cc',
         'integration_tests/seccomp_broker_process_unittest.cc',
         'seccomp-bpf-helpers/baseline_policy_unittest.cc',
         'seccomp-bpf-helpers/syscall_parameters_restrictions_unittests.cc',
@@ skipping 26 matching lines @@
     [ 'use_base_test_suite==1', {
       'dependencies': [
         '../base/base.gyp:test_support_base',
       ],
       'defines': [
         'SANDBOX_USES_BASE_TEST_SUITE',
       ],
     }],
   ],
 }