Removed unused code and an unused event.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@181948 91177308-0d34-0410-b5e6-96231b3b80d8
<rdar://problem/11158023>

Make type summary add and breakpoint command add show an helpful prototype + argument reference when manually typing Python code for these elements

git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@181968 91177308-0d34-0410-b5e6-96231b3b80d8