Remove useless byte{2,4}{be,le} encodings from mbstring

There is no meaningful difference between these and UCS-{2,4}. They are
just a little bit more lax about passing errors silently. They also have
no known use.

Alias to UCS-{2,4} in case someone, somewhere is using them.

Author: alexdowad

ext/mbstring/config.m4

@@ -97,8 +97,6 @@ AC_DEFUN([PHP_MBSTRING_SETUP_LIBMBFL], [
     libmbfl/filters/mbfilter_ascii.c
     libmbfl/filters/mbfilter_base64.c
     libmbfl/filters/mbfilter_big5.c
-    libmbfl/filters/mbfilter_byte2.c
-    libmbfl/filters/mbfilter_byte4.c
     libmbfl/filters/mbfilter_cp1251.c
     libmbfl/filters/mbfilter_cp1252.c
     libmbfl/filters/mbfilter_cp1254.c

ext/mbstring/config.w32

@@ -18,7 +18,7 @@ if (PHP_MBSTRING != "no") {
 
 		ADD_SOURCES("ext/mbstring/libmbfl/filters", "html_entities.c \
 			mbfilter_7bit.c mbfilter_ascii.c mbfilter_base64.c mbfilter_big5.c \
-			mbfilter_byte2.c mbfilter_byte4.c mbfilter_cp1251.c mbfilter_cp1252.c \
+			mbfilter_cp1251.c mbfilter_cp1252.c \
 			mbfilter_cp866.c mbfilter_cp932.c mbfilter_cp936.c mbfilter_cp51932.c \
 			mbfilter_euc_cn.c mbfilter_euc_jp.c mbfilter_euc_jp_win.c mbfilter_euc_kr.c \
 			mbfilter_euc_tw.c mbfilter_htmlent.c mbfilter_hz.c mbfilter_iso2022_kr.c \