Remove the last vestige of the world before data formatters :-)
Function pointers had a summary generated for them bypassing formatters, directly as part of the ValueObject subsystem

This patch transitions that code into a hardcoded summary



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@223906 91177308-0d34-0410-b5e6-96231b3b80d8