Cleaned up a few functions that never get used.

Specifically, the expression parser used to use
functions attached to SymbolContext to do lookups,
but nowadays it searches a ModuleList or Module
directly instead.  These functions had no
remaining clients so I removed them to prevent
bit rot.

I also removed a stray callback function from
ClangExpressionDeclMap.


git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@141899 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed