Remove unused png files

Author: rbuj

accessx-status/docs/C/figures/accessx_sticky-ctrl-key.png

@@ -9,7 +9,6 @@ HELP_MEDIA = figures/accessx_bounce-keys.png \
 	figures/accessx-status-applet.png \
 	figures/accessx-status-disabled.png \
 	figures/accessx_sticky-altGr-key.png \
-	figures/accessx_sticky-ctrl-key.png \
 	figures/accessx_sticky-keys.png \
 	figures/accessx_sticky-meta-key.png \
 	figures/accessx_sticky-shift-key.png \

accessx-status/docs/Makefile.am

@@ -4,7 +4,6 @@ HELP_ID = mate-char-palette
 HELP_FILES = index.docbook legal.xml
 
 HELP_MEDIA = figures/charpalette_applet.png \
-		figures/charpalette_chargroup.png \
 		figures/charpick_characters.png \
 		figures/charpick-preferences.png