remove duplicate

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15883 d0543943-73ff-0310-b7d9-9358b9ac24b2

build/modules.conf.in

@@ -55,7 +55,6 @@ endpoints/mod_loopback
 #endpoints/mod_opal
 #endpoints/mod_skypiax
 #endpoints/mod_h323
-#endpoints/mod_loopback
 #../../libs/openzap/mod_openzap
 #asr_tts/mod_unimrcp
 #asr_tts/mod_flite