Remove the ISO 14755 feature

And move it to the patches section.
Keeping it would force to add an exec pledge on OpenBSD, and some
people think it's bloated, so bye!

st.c

@@ -38,15 +38,11 @@
 
 /* macros */
 #define IS_SET(flag)		((term.mode & (flag)) != 0)
-#define NUMMAXLEN(x)		((int)(sizeof(x) * 2.56 + 0.5) + 1)
 #define ISCONTROLC0(c)		(BETWEEN(c, 0, 0x1f) || (c) == '\177')
 #define ISCONTROLC1(c)		(BETWEEN(c, 0x80, 0x9f))
 #define ISCONTROL(c)		(ISCONTROLC0(c) || ISCONTROLC1(c))
 #define ISDELIM(u)		(utf8strchr(worddelimiters, u) != NULL)
 
-/* constants */
-#define ISO14755CMD		"dmenu -w \"$WINDOWID\" -p codepoint: </dev/null"
-
 enum term_mode {
 	MODE_WRAP        = 1 << 0,
 	MODE_INSERT      = 1 << 1,
@@ -1981,28 +1977,6 @@ tprinter(char *s, size_t len)
 	}
 }
 
-void
-iso14755(const Arg *arg)
-{
-	FILE *p;
-	char *us, *e, codepoint[9], uc[UTF_SIZ];
-	unsigned long utf32;
-
-	if (!(p = popen(ISO14755CMD, "r")))
-		return;
-
-	us = fgets(codepoint, sizeof(codepoint), p);
-	pclose(p);
-
-	if (!us || *us == '\0' || *us == '-' || strlen(us) > 7)
-		return;
-	if ((utf32 = strtoul(us, &e, 16)) == ULONG_MAX ||
-	    (*e != '\n' && *e != '\0'))
-		return;
-
-	ttywrite(uc, utf8encode(utf32, uc), 1);
-}
-
 void
 toggleprinter(const Arg *arg)
 {