pkgconfig: remove some cruft

gl has moved to -base, remove leftover files.

pkgconfig/Makefile.am

@@ -36,7 +36,6 @@ cp_verbose_0 = @echo "  CP     $@";
 		-e "s|[@]audiolibdir[@]|$(abs_top_builddir)/gst-libs/gst/audio/.libs|" \
 		-e "s|[@]videolibdir[@]|$(abs_top_builddir)/gst-libs/gst/video/.libs|" \
 		-e "s|[@]codecparserslibdir[@]|$(abs_top_builddir)/gst-libs/gst/codecparsers/.libs|" \
-		-e "s|[@]gllibdir[@]|$(abs_top_builddir)/gst-libs/gst/gl/.libs|" \
 		-e "s|[@]insertbinlibdir[@]|$(abs_top_builddir)/gst-libs/gst/insertbin/.libs|" \
 		-e "s|[@]mpegtslibdir[@]|$(abs_top_builddir)/gst-libs/gst/mpegts/.libs|" \
 		-e "s|[@]playerlibdir[@]|$(abs_top_builddir)/gst-libs/gst/player/.libs|" \

pkgconfig/gstreamer-gl-uninstalled.pc.in

@@ -1,18 +0,0 @@
-prefix=
-exec_prefix=
-libdir=@gllibdir@
-includedir=@abs_top_builddir@/gst-libs
-girdir=@abs_top_builddir@/gst-libs/gst/base
-typelibdir=@abs_top_builddir@/gst-libs/gst/base
-gl_platforms=@GL_PLATFORMS@
-gl_winsys=@GL_WINDOWS@
-gl_apis=@GL_APIS@
-
-Name: GStreamer OpenGL Plugins Libraries, Uninstalled
-Description: Streaming media framework, OpenGL plugins libraries, uninstalled
-Version: @VERSION@
-Requires: gstreamer-base-@GST_API_VERSION@ gstreamer-@GST_API_VERSION@
-
-Libs: -L${libdir} -lgstgl-@GST_API_VERSION@
-Cflags: -I@abs_top_srcdir@/gst-libs -I@abs_top_builddir@/gst-libs @GL_CFLAGS@
-

pkgconfig/gstreamer-gl.pc.in

@@ -1,16 +0,0 @@
-prefix=@prefix@
-exec_prefix=@exec_prefix@
-libdir=@libdir@
-includedir=@includedir@/gstreamer-@GST_API_VERSION@
-pluginsdir=@libdir@/gstreamer-@GST_API_VERSION@
-gl_platforms=@GL_PLATFORMS@
-gl_winsys=@GL_WINDOWS@
-gl_apis=@GL_APIS@
-
-Name: GStreamer OpenGL Plugins Libraries
-Description: Streaming media framework, OpenGL plugins libraries
-Version: @VERSION@
-Requires: gstreamer-base-@GST_API_VERSION@ gstreamer-@GST_API_VERSION@
-
-Libs: -L${libdir} -lgstgl-@GST_API_VERSION@
-Cflags: -I${includedir} -I${libdir}/gstreamer-@GST_API_VERSION@/include @GL_CFLAGS@