[binutils-gdb] Deleted branch 'iter-expand-unify-no-map-sym-fns'

[Tom Tromey]

The branch 'iter-expand-unify-no-map-sym-fns' was deleted.
It previously pointed to:

 3df34ab8883... Remove linespec.c:symtab_collector class

Diff:

!!! WARNING: THE FOLLOWING COMMITS ARE NO LONGER ACCESSIBLE (LOST):
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  3df34ab... Remove linespec.c:symtab_collector class
  903f616... Clean up iterate_over_symtabs
  3993933... Remove an extraneous 'return' from void method
  9fb4613... Convert map_symbol_filenames to method