Cleanup the MIReadMe.txt after the recent changes in lldb-mi.
Cleanup the MIReadMe.txt after the recent changes in lldb-mi.

This commit removed the redundant and out of date stuff from the file.



git-svn-id: 4c4cc70b1ef44ba2b7963015e681894188cea27e@232477 91177308-0d34-0410-b5e6-96231b3b80d8

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