* common/Makefile.am (common_sources): Remove b64enc.c and b64dec.c.
(module_maint_tests): Remove t-b64.
(t_b64_LDADD): Remove.
* common/util.h: Remove the internal API.
* common/ssh-utils.c (get_fingerprint): Use the gpgrt_b64 API.
(ssh_public_key_in_base64): Likewise.
* dirmngr/crlfetch.c (my_es_read, crl_close_reader): Likewise.
* dirmngr/dirmngr-client.c (data_cb, do_lookup): Likewise.
* dirmngr/misc.c (armor_data): Likewise.
* g10/export.c (export_one_ssh_key, export_secret_ssh_key): Likewise.
* tools/gpg-card.c (cmd_writecert): Likewise.
* tools/mime-parser.c (parse_message_cb, mime_parser_release)
(process_part_data): Likewise.
* tools/wks-util.c (wks_armor_key): Likewise.