CC-5126:

Media Monitor: Exception happens when cuein value is 00:00:00

-fixed this be ensuring we're not writing cue-in/out values to the file.
This should never have been allowed.

python_apps/media-monitor2/media/monitor/metadata.py

@@ -45,8 +45,6 @@ airtime2mutagen = {
     "MDATA_KEY_URL"         : "website",
     "MDATA_KEY_ISRC"        : "isrc",
     "MDATA_KEY_COPYRIGHT"   : "copyright",
-    "MDATA_KEY_CUE_IN"      : "cuein",
-    "MDATA_KEY_CUE_OUT"     : "cueout",
 }