stopped disabling SCTP for windows

(Windows XP issue should be fixed by usrsctp DEPS roll: https://codereview.chromium.org/23960004/)

BUG=

Review URL: https://chromiumcodereview.appspot.com/23766013

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@221865 0039d316-1c4b-4281-b951-d872f2087c98

third_party/libjingle/libjingle.gyp

@@ -783,13 +783,9 @@
             }],
             # TODO(mallinath) - Enable SCTP for Android and iOS platforms.
             ['OS!="android" and OS!="ios"', {
-              'conditions': [
-                ['OS!="win"', {
               'defines': [
                 'HAVE_SCTP',
               ],
-                }],
-              ],
               'sources': [
                 '<(libjingle_source)/talk/media/sctp/sctpdataengine.cc',
                 '<(libjingle_source)/talk/media/sctp/sctpdataengine.h',