Two changes:

Two changes:
1. Delete type handle regardless of whether a collision occured
2. Remove a MAJOR pessimization of runtime performance (thought be be an optimization at the time).

This second one was causing a 105k llvm file (from gcc) to parse in 58 seconds... without the
'optimization' it now parses in 3.64 seconds.  I suck.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@933 91177308-0d34-0410-b5e6-96231b3b80d8