Delete TypeDatabase.

Merge the functionality into the random access type collection.
This class was only being used in 2 places, so getting rid of it
simplifies the code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305653 91177308-0d34-0410-b5e6-96231b3b80d8
11 files changed