src/*.c: Remove some additional unused parameters.

src/*.c: Remove some additional unused parameters.

* lisp.h (multibyte_char_to_unibyte):
* character.c (multibyte_char_to_unibyte): Remove parameter `rev_tbl',
  unused since revno:43563.1.16 (2002-03-01) and revno:84043 (2008-02-1).
* character.h (CHAR_TO_BYTE8):
* cmds.c (internal_self_insert):
* editfns.c (general_insert_function):
* keymap.c (push_key_description):
* search.c (Freplace_match):
* xdisp.c (message_dolog, set_message_1): All callers changed.

* coding.c (encode_designation_at_bol): Remove parameter `charbuf_end',
  unused since revno:43563.1.17 (2002-03-01) and revno:84043 (2008-02-1).
  All callers changed.