I messed up my MATLAB install... Followed https://help.ubuntu.com/community/MATLAB/R2010a but launcher isn't working. It says "Could not launch 'MATLAB R2010a' Failed to execute child process "matlab" (No such file or directory). Probably messed up the place where I downloaded it.

I want to start off with a clean slate.. I removed all of the files installed, but am left with the launcher icon created using these instructions: Create A MATLAB Launcher

Get an icon:

sudo wget http://upload.wikimedia.org/wikipedia/commons/2/21/Matlab_Logo.png -O /usr/share/icons/matlab.png

Get the launcher file:

sudo wget 'https://help.ubuntu.com/community/MATLAB?action=AttachFile&do=get&target=matlab-r2010a.desktop' -O /usr/share/applications/matlab.desktop

How do I remove this launcher icon???

Thank you!!