Remove Remoting Host plugin from linux/FILES.cfg

The Remoting Host plugin is built for Linux but not ChromeOS.  This is a
temporary fix until we can update the stage_build script to deal with this
missing file on official ChromeOS build.

This is a partial revert of r95103.

BUG=91549
TEST=Official ChromeOS build (staging) no longer fails.

Review URL: http://codereview.chromium.org/7589001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@95656 0039d316-1c4b-4281-b951-d872f2087c98

chrome/tools/build/linux/FILES.cfg

@@ -123,10 +123,4 @@ FILES = [
     'arch': ['64bit'],
     'buildtype': ['dev', 'official'],
   },
-  # Remoting Host plugin files:
-  {
-    'filename': 'libremoting_host_plugin.so',
-    'arch': ['32bit', '64bit'],
-    'buildtype': ['dev', 'official'],
-  },
 ]