Remove unused support for SysV shared memory

src/trusted/desc/build.scons

 # -*- python -*-
 # Copyright 2009 The Native Client Authors.  All rights reserved.
 # Use of this source code is governed by a BSD-style license that can
 # be found in the LICENSE file.
 
 import os
 
 Import('env')
 
 # nrd_xfer.c needs no-strict-aliasing because NaClImcMsgIoVec and
@@ skipping 39 matching lines @@
     'nrd_all_modules.c',
     nrd_xfer_obj,
     wrapper_obj,
 ]
 
 if env.Bit('windows'):
   nrd_lib_inputs += ['win/nacl_desc.c']
 else:
   nrd_lib_inputs += ['posix/nacl_desc.c']
 
-if env.Bit('linux') and not env.Bit('android'):
-  nrd_lib_inputs += ['linux/nacl_desc_sysv_shm.c']
-
 if env.Bit('windows'):
   nrd_lib_inputs += [
       'nacl_desc_conn_cap.c',
       'nacl_desc_imc_bound_desc.c',
       'nacl_makeboundsock.c',
       ]
 else:
   nrd_lib_inputs += [
       'posix/nacl_desc_conn_cap.c',
       'posix/nacl_desc_imc_bound_desc.c',
@@ skipping 49 matching lines @@
 env.AddNodeToTestSuite(node, ['small_tests'],
                        'run_nacl_desc_io_alloc_ctor_test')
 
 
 # TODO: add comment
 if env.Bit('windows'):
   env.Append(LIBS = [ 'ws2_32', 'advapi32' ])
 
 env.EnsureRequiredBuildWarnings()
 nrd_xfer_env.EnsureRequiredBuildWarnings()