Remove quick_symbol_functions::expand_symtabs_with_fullname

Remove quick_symbol_functions::expand_symtabs_with_fullname

This removes quick_symbol_functions::expand_symtabs_with_fullname,
replacing it with a call to expand_symtabs_matching.  As with the
previous patches, the implementation is consolidated in the objfile
method.

gdb/ChangeLog
2021-04-17  Tom Tromey  <tom@tromey.com>

	* quick-symbol.h (struct quick_symbol_functions)
	<expand_symtabs_with_fullname>: Remove.
	* psymtab.c (psymbol_functions::expand_symtabs_with_fullname):
	Remove.
	* psympriv.h (struct psymbol_functions)
	<expand_symtabs_with_fullname>: Remove.
	* dwarf2/read.c (struct dwarf2_base_index_functions)
	<expand_symtabs_with_fullname>: Remove.
	(dwarf2_base_index_functions::expand_symtabs_with_fullname):
	Remove.
	* objfiles.h (struct objfile) <expand_symtabs_with_fullname>:
	Update comment.
	* symfile-debug.c (objfile::expand_symtabs_with_fullname):
	Rewrite.