package/gst1-plugins-base: drop legacy remnant comment

In 76722342000d (gst1-plugins-base: bump version to 1.12.0), the unknown
options were removed, but the comment associated to --disable-gio_unix_2_0
was left out.

Drop it now.

Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Adam Duskett <aduskett@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/gstreamer1/gst1-plugins-base/gst1-plugins-base.mk

@@ -11,7 +11,6 @@ GST1_PLUGINS_BASE_INSTALL_STAGING = YES
 GST1_PLUGINS_BASE_LICENSE_FILES = COPYING.LIB
 GST1_PLUGINS_BASE_LICENSE = LGPL-2.0+, LGPL-2.1+
 
-# gio_unix_2_0 is only used for tests
 GST1_PLUGINS_BASE_CONF_OPTS = \
 	--disable-examples \
 	--disable-valgrind \