removing "trash" from linux

[FOBSIDE]

im relatively inexperienced with linux. im actually running redhat on my box. i compiled the tar.gz file for LICQ and the QT interface but it wont run. i will get it to run later but i was wondering, how do i remove what was "installed" of these two programs? or does it not matter? should i just leave the files there? any help would be greatly appreciated. thanks.