Remove bogus euro sign entry from keysymtab

Not sure what it's doing here, but converting "€" to a keysym
doesn't work with this entry. 0x13a4 doesn't appear in
xkbcommon-keysyms.h. 0x20ac is the keysym documented in the
header (and it's the last entry in the table).

It's been in the table since it was introduced in e0524296d2
("Add API for getting unicode representation of a keysym").

Co-authored-by: Simon Ser <contact@emersion.fr>

src/keysym-utf.c

@@ -819,7 +819,6 @@ static const struct codepair keysymtab[] = {
     { 0x0ef9, 0x11f0 }, /*  Hangul_J_KkogjiDalrinIeung ᇰ HANGUL JONGSEONG YESIEUNG */
     { 0x0efa, 0x11f9 }, /*        Hangul_J_YeorinHieuh ᇹ HANGUL JONGSEONG YEORINHIEUH */
     { 0x0eff, 0x20a9 }, /*                  Korean_Won ₩ WON SIGN */
-    { 0x13a4, 0x20ac }, /*                        Euro € EURO SIGN */
     { 0x13bc, 0x0152 }, /*                          OE ΠLATIN CAPITAL LIGATURE OE */
     { 0x13bd, 0x0153 }, /*                          oe œ LATIN SMALL LIGATURE OE */
     { 0x13be, 0x0178 }, /*                  Ydiaeresis Ÿ LATIN CAPITAL LETTER Y WITH DIAERESIS */

test/keysym.c

@@ -252,6 +252,7 @@ main(void)
     assert(test_utf32_to_keysym(0xd7, XKB_KEY_multiply));
     assert(test_utf32_to_keysym('-', XKB_KEY_minus));
     assert(test_utf32_to_keysym(0x10fffd, 0x110fffd));
+    assert(test_utf32_to_keysym(0x20ac, XKB_KEY_EuroSign));
 
     // Unicode non-characters
     assert(test_utf32_to_keysym(0xfdd0, XKB_KEY_NoSymbol));