package/gstreamer1/gstd: drop readline dependency

readline is not a dependency since bump to version 0.15.0 in commit
cbd06adac50e304f413689febf676911ae29d967 and
https://github.com/RidgeRun/gstd-1.x/commit/978b503840e0f9ae99f732113babbc4fbfb2a770

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gstreamer1/gstd/Config.in

@@ -10,7 +10,6 @@ config BR2_PACKAGE_GSTD
 	select BR2_PACKAGE_LIBEDIT
 	select BR2_PACKAGE_LIBGLIB2
 	select BR2_PACKAGE_LIBSOUP
-	select BR2_PACKAGE_READLINE
 	help
 	  GStreamer Daemon, also called gstd, is a GStreamer framework
 	  for controlling audio and video streaming using an

package/gstreamer1/gstd/gstd.mk

@@ -17,8 +17,7 @@ GSTD_DEPENDENCIES = \
 	libdaemon \
 	libedit \
 	libglib2 \
-	libsoup \
-	readline
+	libsoup
 
 GSTD_CONF_OPTS = \
 	-Denable-tests=disabled \