Cleanup obsolete INIT_MAILCAP

Bug-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=820902

doc-de/README.func

@@ -37,7 +37,6 @@ HELP		View help
 HISTORY 	View browser history
 INFO		View info of current document
 INTERRUPT	Suspend w3m
-INIT_MAILCAP	Reread mailcap (mainly for local-CGI)
 ISEARCH 	Incremental search forward
 ISEARCH_BACK	Incremental search backward
 LEFT		Shift screen one column

doc-jp/README.func

@@ -36,7 +36,6 @@ GOTO_RELATIVE
 HELP		<09>إ<EFBFBD><D8A5>ץե<D7A5><D5A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɽ<EFBFBD><C9BD><EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD>
 HISTORY                URL<52><4C><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɽ<EFBFBD><C9BD><EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD>
 INFO		<09><><EFBFBD>ߤ<EFBFBD>ʸ<EFBFBD><CAB8><EFBFBD>˴ؤ<CBB4><D8A4><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ɽ<EFBFBD><C9BD><EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD>
-INIT_MAILCAP   mailcap <20><><EFBFBD><EFBFBD><EFBFBD>ɤ߹<C9A4><DFB9>ߤ<EFBFBD><DFA4>ޤ<EFBFBD>(<28><><EFBFBD><EFBFBD> local-CGI <20><>)
 INTERRUPT	ʸ<><CAB8><EFBFBD><EFBFBD><EFBFBD>ɤ߹<C9A4><DFB9>ߤ<EFBFBD><DFA4><EFBFBD><EFBFBD>Ǥ<EFBFBD><C7A4>ޤ<EFBFBD>
 ISEARCH		<09>ե<EFBFBD><D5A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ˤफ<CBA4>äƥ<C3A4><C6A5>󥯥<EFBFBD><F3A5AFA5><EFBFBD><EFBFBD>󥿥륵<F3A5BFA5><EBA5B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD>
 ISEARCH_BACK	<09>ե<EFBFBD><D5A5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ƭ<EFBFBD>ˤफ<CBA4>äƥ<C3A4><C6A5>󥯥<EFBFBD><F3A5AFA5><EFBFBD><EFBFBD>󥿥륵<F3A5BFA5><EBA5B5><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ޤ<EFBFBD>

doc/README.func

@@ -37,7 +37,6 @@ HELP		View help
 HISTORY 	View browser history
 INFO		View info of current document
 INTERRUPT	Suspend w3m
-INIT_MAILCAP	Reread mailcap (mainly for local-CGI)
 ISEARCH 	Incremental search forward
 ISEARCH_BACK	Incremental search backward
 LEFT		Shift screen one column

w3m-doc/sample/keymap.cgi

@@ -203,7 +203,6 @@ GOTO_LINK
 HELP
 HISTORY
 INFO
-INIT_MAILCAP
 INTERRUPT
 LEFT
 LINE_BEGIN