svnkit is marked for autoremoval from testing

[Debian testing autoremoval watch]

svnkit 1.8.14-3 is marked for autoremoval from testing on 2020-04-07

It is affected by these RC bugs:
952103: svnkit: FTBFS:     [javac] /<<PKGBUILDDIR>>/svnkit-javahl16/src/main/java/org/apache/subversion/javahl/SVNClient.java:14: error: SVNClient is not abstract and does not override abstract method blame(String,Revision,Revision,Revision,boolean,boolean,DiffOptions,BlameRangeCallback,BlameLineCallback) in ISVNClient