Fixing HLS on win32

Removing m3u8 from the extensions to demux shortcut list. This was
preventing the TS demux to be used. Instead, the M3U8 importer was used.

src/input/demux.c

@@ -125,7 +125,6 @@ demux_t *demux_New( vlc_object_t *p_obj, input_thread_t *p_parent_input,
             { "dv",   "dv" },
             { "drc",  "dirac" },
             { "m3u",  "m3u" },
-            { "m3u8", "m3u8" },
             { "mkv",  "mkv" }, { "mka",  "mkv" }, { "mks",  "mkv" },
             { "mp4",  "mp4" }, { "m4a",  "mp4" }, { "mov",  "mp4" }, { "moov", "mp4" },
             { "nsv",  "nsv" },