I am assuming you want to get rid of 3.10 Kernels/linux-image?
- Login to 3.7 kernel. (3rd from top)
- Open terminal and do
Code:
aptitude search linux-image
- This should return all installed Linux-Images in your system. You should be able to remove any (I recommend not to remove linux-image-3.7 as it's the official one)
- To remove do
Code:
apt-get remove <image-name>
Possibly the reason you have that extra kernel is that you have more repositories (possibly unrecommended ones).
Here's a nice post to sort out sources.list and revert back to official repositories.
How to add official Kali Linux Repositories?
Hope that helps
p.s. also what's up with gyazo.com? It pops up with executable all over ... !!!