Remove the node visiting code from LLDB, as we are now relying on this code living in the Swift compiler
Remove the node visiting code from LLDB, as we are now relying on this code living in the Swift compiler

This patch removes *a lot* of code and as such I proclaim it to be A Very Good Patch.

apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb,apple/swift-lldb