[SwiftLanguageRuntime] Remove unneded and potentially wrong code.
[SwiftLanguageRuntime] Remove unneded and potentially wrong code.

We shouldn't change the address of the class and replace it with
the ISA pointer. RemoteAST, if anything, should do that for us,
but we don't need it anyway.

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