Remove the __import__ hack of lldbtest_config.
Remove the __import__ hack of lldbtest_config.

I think the underlying problem was fixed by r251819, but I can't
reproduce the problem.  So this is to check whether it does in
fact fix the problem.

git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@251822 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-lldb,llvm-mirror/lldb,llvm-mirror/lldb,llvm-mirror/lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,llvm-mirror/lldb,apple/swift-lldb