ticket:10253 Remove development branch, no longer needed.

git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/andy@33996 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10273 Create development branch for continued C++ plurals work.

git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/andy@33997 251d0590-4201-4cf1-90de-194747b24ca1