Remove spurious reference to radars in code (we try not to put Radar numbers into the sources.)

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@190023 91177308-0d34-0410-b5e6-96231b3b80d8
Remove some unused #includes.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@190025 91177308-0d34-0410-b5e6-96231b3b80d8
Remove an unused ivar.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@190026 91177308-0d34-0410-b5e6-96231b3b80d8
Remove a spurious comment.

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@190027 91177308-0d34-0410-b5e6-96231b3b80d8