Remove language param from name_matcher in struct quick_symbol_functions

Remove language param from name_matcher in struct quick_symbol_functions

The quick_symbol_functions struct contains a field which is pointer
a function which takes another function, called name_matcher, as
its parameter.  This name_matcher currently has 3 arguments, one
of them being the language. This parameter is no longer used, and
thus deleted.

gdb/ChangeLog:

        * symfile.h (struct quick_symbol_functions) [expand_symtabs_matching]:
        Remove language parameter from name_matcher.  Adjust the comment.
        * symtab.c (search_symbols_name_matches, expand_partial_symbol_name):
        Remove language parameter.
        * ada-lang.c (ada_expand_partial_symbol_name): Likewise.
        * linespec.c (iterate_name_matcher): Likewise.
        * dwarf2read.c (dw2_expand_symtabs_matching): Adjust type of
        name_matcher.  Adjust call accordingly.
        * psymtab.c (expand_symtabs_matching_via_partial): Likewise.
        (maintenance_check_symtabs): Adjust type of parameter "fun".
        * psymtab.h (maintenance_check_symtabs): Likewise.