keepalived: remove popt dependency

popt is not needed since version 1.3.1 and:
https://github.com/acassen/keepalived/commit/3452517c4f2b69badabf19fc06cc56db49d37603

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/keepalived/Config.in

@@ -4,7 +4,6 @@ config BR2_PACKAGE_KEEPALIVED
 	depends on !BR2_STATIC_LIBS # uses libdl
 	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_4
 	select BR2_PACKAGE_OPENSSL
-	select BR2_PACKAGE_POPT
 	help
 	  The main goal of the keepalived project is to add a strong &
 	  robust keepalive facility to the Linux Virtual Server

package/keepalived/keepalived.mk

@@ -6,7 +6,7 @@
 
 KEEPALIVED_VERSION = 1.4.2
 KEEPALIVED_SITE = http://www.keepalived.org/software
-KEEPALIVED_DEPENDENCIES = host-pkgconf openssl popt
+KEEPALIVED_DEPENDENCIES = host-pkgconf openssl
 KEEPALIVED_LICENSE = GPL-2.0+
 KEEPALIVED_LICENSE_FILES = COPYING
 # 0001-configure.ac-do-not-force-PIE.patch