* notes/sparse-directories.txt: Remove some obsolete notes about API     upgrades; they were incorrect in light of r24968 anyway.
* notes/sparse-directories.txt: Remove some obsolete notes about API
    upgrades; they were incorrect in light of r24968 anyway.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion