Revert "HBASE-11912 Catch some bad practices at compile time with error-prone"

This reverts commit 7ed0260eff425e7e7a57193a67419fae29aa4f30.
HBASE-11870 Optimization : Avoid copy of key and value for tags addition in AC and VC.
HBASE-12202 Support DirectByteBuffer usage in HFileBlock - addendum
HBASE-2609 Harmonize the Get and Delete operations