[rfa:symtab] Delete broken "memory mapped objfile cache"

[Andrew Cagney]

> 
> 2003-11-02  Andrew Cagney  <cagney@redhat.com>
> 
> 	* top.h (mapped_symbol_files): Delete declaration.
> 	* main.c (captured_main): Delete option "m" and "mapped".
> 	* objfiles.c (mapped_symbol_files): Delete variable.
> 	* symfile.c (symbol_file_command): Delete mmap code.
> 	(symbol_file_add_with_addrs_or_offsets): Ditto.
> 	(add_symbol_file_command, reread_separate_symbols): Ditto.
> 	* objfiles.h (OBJF_MAPPED): Delete.
> 	* objfiles.c (allocate_objfile) [USE_MMALLOC]: Delete.
> 	(free_objfile) [USE_MMALLOC]: Ditto.
> 	(open_existing_mapped_file): Delete function.
> 	(open_mapped_file): Delete function.
> 	(map_to_file): Delete function.
> 

Ping.

Andrew