Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
There should have been an About PDF in the Developer folder that details how to uninstall the SDK, which mainly revolves around how to use the uninstall-devtools tool in Developer/Library/
 
Are you following the directions? If you installed them to /Developer, then what you type is:
Code:
sudo /Developer/Library/uninstall-devtools --mode= (whatever mode)
 
Hm, that script doesn't work.

Running the uninstall script results in:

Use of uninitialized value $dir_name in substitution (s///) at ./uninstall-devtools line 153.
Use of uninitialized value $developer_dir in concatenation (.) or string at ./uninstall-devtools line 118.
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.