remove unused entry from ChangeLog

ChangeLog

@@ -9,11 +9,3 @@ Note to developers:
       For 1.0.26 and beyond we will generate the ChangeLog from the git
       commit messages at release time.  Instead of documenting your work
       here, just document it in your commit messages.
-
-2015-10-14 Rolf Bensch <rolf at bensch hyphen online dot de>
-    * backend/pixma_mp730.c, doc/descriptions/pixma.desc, doc/sane-pixma.man:
-      New scanners Canon PIXUS MP5/SmartBase MPC190/imageCLASS MPC190 and
-      Canon MP10/SmartBase MPC200/imageCLASS MPC200,
-      reported by Gernot Hassenpflug. The MP5/... needs futher testing.
-    * backend/pixma.h, doc/descriptions/pixma.desc:
-      Pixma backend version 0.17.24