Cleanup: Remove src/trusted/gio/, since it is unused

GioShm has been unused since r11473 (from June 2013), when nexe
loading was converted to using NaClDescs instead of Gio.

BUG=none
TEST=build

Review URL: https://codereview.chromium.org/594733005

git-svn-id: svn://svn.chromium.org/native_client/trunk/src/native_client/site_scons@13789 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2
diff --git a/site_tools/library_deps.py b/site_tools/library_deps.py
index 55c5428..6fe1df4 100644
--- a/site_tools/library_deps.py
+++ b/site_tools/library_deps.py
@@ -51,7 +51,6 @@
         'manifest_proxy',
         'simple_service',
         'thread_interface',
-        'gio_wrapped_desc',
         'nonnacl_srpc',
         'nrd_xfer',
         'nacl_perf_counter',