This page in Ubuntu’s bug tracker describes this particular situation. Apparently this is a known bug with 14.04, possibly because of a regression with GLib, or a mismatch between GLib and GTK (so says one of the commenters).
Nothing is trying to remove Sublime, it’s just an error in a programming library. If nothing is crashing on you, or becoming unusable, just ignore it…
EDIT
This issue has been fixed in 14.10 and onwards. You can upgrade your distribution, or simply upgrade glib and the error should go away. Upgrading to Sublime Text 3 (which is highly recommended anyway) will also fix the problem.