Move the lookup tables cleanup in VisitNamedDecl.
Move the lookup tables cleanup in VisitNamedDecl.

Remove the code duplication. Change RemoveRemoveFromRedeclChain to VisitRedeclarable
so that it follows the 'naming' convention of the visitor.

marsupial/cling,perovic/cling,karies/cling,marsupial/cling,perovic/cling,root-mirror/cling,root-mirror/cling,marsupial/cling,karies/cling,marsupial/cling,perovic/cling,karies/cling,root-mirror/cling,root-mirror/cling,karies/cling,karies/cling,root-mirror/cling,root-mirror/cling,marsupial/cling,karies/cling,perovic/cling,perovic/cling,marsupial/cling