Remove ChangeLog files from git repository

This information is tracked fully in the git repository, so
no point having the ChangeLog duplicate it, and it interferes
with grepping the repository.

We are going to create the ChangeLogs on the fly when generating
tarballs going forward (with a limited history), since it's still
valuable for tarball consumers to be able to easily see a list of
recent changes.

Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer-project/-/issues/73

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3521>

subprojects/gstreamer/docs/random/old/ChangeLog.gst-plugins

@@ -1,91 +0,0 @@
-2003-12-16  Thomas Vander Stichele  <thomas at apestaart dot org>
-
-        * configure.ac: disable pixbuf loader by default as requested
-
-2003-12-14  Thomas Vander Stichele  <thomas at apestaart dot org>
-
-        * configure.ac: make pixbuf loader configurable
-
-2003-12-14  Amaury Jacquot <sxpert@esitcom.org>
-	
-	* sys/xvideo/gstximage.c: remove 3 unnecessary X headers
-	* sys/xvideo/gstxvimage.c: same
-	* sys/xvideo/gstxwindow.c: same
-	these problems occur when using the X server from freedesktop.org
-
-2003-12-03  Thomas Vander Stichele <thomas at apestaart dot org>
-
-	* common/m4/gst-feature.m4: *** instead of newline when not built
-	* configure.ac: fix X detection when no X stuff present
-	* gst-libs/gst/Makefile.am: put X dependencies inside conditional
-
-2003-07-12  Thomas Vander Stichele <thomas at apestaart dot org>
-
-        * gst-plugins.spec.in: fix up spec file
-        * gst/debug/Makefile.am:
-          gst/realmedia/Makefile.am: use proper LD_FLAGS for plugins
-
-2003-02-14  Colin Walters  <walters@verbum.org>
-
-	* ext/gnomevfs/gstgnomevfssrc.c (unicodify,
-	gst_gnomevfssrc_unicodify): New functions.
-	(audiocast_thread_run): Use them.  Remove redundant if from
-	"if (foo) g_free (foo);" bits.  Change fprintf to g_print.
-	(gst_gnomevfssrc_received_headers_callback): Ditto.
-	(gst_gnomevfssrc_get_icy_metadata): Ditto.
-
-2003-02-06  Colin Walters  <walters@gnu.org>
-
-	* ext/gnomevfs/gstgnomevfssrc.c: Port all the fixes from
-	BRANCH-GSTREAMER-0_6.
-
-2003-01-25  Colin Walters  <walters@gnu.org>
-
-	* ext/gnomevfs/gstgnomevfssrc.c (gst_gnomevfssrc_open_file): Don't
-	make a size request when in iradio mode.
-
-2002-11-25  Colin Walters  <walters@debian.org>
-
-	* ext/gnomevfs/gstgnomevfssrc.c (gst_gnomevfssrc_received_headers_callback):
-	Test for url in correct variable.
-
-2002-11-17  Ken MacLeod  <ken@bitsko.slc.ut.us>
-
-	* gst/modplug/modplug_types.cc: Renamed from
-	gst/modplug/modplug_types.c.  Change GST_BUFFER_DATA(buf) result
-	type from 'gchar' to 'gunit8'.
-
-2002-07-07  Richard Boulton <richard@tartarus.org>
-
-	* LICENSE_readme: Mention that synaesthesia is derived from GPL
-	  code.
-
-2002-06-03  Richard Boulton <richard@tartarus.org>
-
-	* m4/mpeg2dec.m4: Test for cpuaccel library as well as mpeg2dec
-	  library.  Add appropriate includes before test compile of mpeg2.h
-	  so that compilation succeeds.
-
-2002-05-06  Thomas Vander Stichele <thomas@apestaart.org>
-
-  	* GConf stuff : from http://www.gnome.org/projects/gconf/ and eog
-	  - added gstreamer-gconf package
-
-2002-02-06  Thomas Vander Stichele <thomas@apestaart.org>
-
-  	* more build cleanup : merging over changes from gst-player
-
-2002-01-17  Bastien Nocera  <hadess@hadess.net>
-
-	* sys/Makefile.am: make the qcam plugin build only
-	only platforms using NASM, ie. x86
-
-2002-01-06 Rodney Dawes <dobey@free.fr>
-
-	* configure.ac: added -lm to cdparanoia check so it works,
-		fixed a couple typos for the libraw1394 checks
-	
-2001-12-20 Thomas Vander Stichele  <thomas@apestaart.org>
-
-	* opened gst-plugins module
-	* starting with sys plugins