Firstly: Please don't hi-jack others threads, and don't dig
up 7 year old carcasses of threads. I split your post out
and made it into a thread of yours.
And to answer your question: if you still have the source
directory, just go there and do "make uninstall".
Out of curiosity: why are you uninstalling Postgres? :}
Btw, you never followed up on your first post here:
which, coincidentally, also was answered by me with
a very similar response...