$ sudo apt-get remove linux-image-extra-3.5.0-030500rc6-generic
Reading package lists... Done
Building dependency tree
Reading state information... Done
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 crda : Breaks: wireless-crda (< 1.15) but 1.14 is to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).