package/gnupg2: drop unrecognized option

--disable-regex has been dropped since version 2.2.22 and
https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=commit;h=ba247a114c75a84473c11c1484013b09fbb9bcd1

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

package/gnupg2/gnupg2.mk

@@ -16,7 +16,7 @@ GNUPG2_DEPENDENCIES = zlib libgpg-error libgcrypt libassuan libksba libnpth \
 	$(if $(BR2_PACKAGE_LIBICONV),libiconv) host-pkgconf
 
 GNUPG2_CONF_OPTS = \
-	--disable-rpath --disable-regex \
+	--disable-rpath \
 	--with-libgpg-error-prefix=$(STAGING_DIR)/usr \
 	--with-libgcrypt-prefix=$(STAGING_DIR)/usr \
 	--with-libassuan-prefix=$(STAGING_DIR)/usr \