Revert "SERVER-6246 Add usersInfo command"

This reverts commit 88b88bd49c2ecdc4a3f0be050360099401310566.
SERVER-6405: char* to StringData for some catalog methods
SERVER-6405: make Top::collectionDrop api easier to work with
SERVER-2996: re-enable RWLockTest2
SERVER-10520 Disable insecure SSL ciphers
SERVER-8864 SERVER-10739 Support concurrent SSL and non-SSL connections
SERVER-6246 Add usersInfo command
SERVER-6399: Return Status from okForStorage-like checks
SERVER-10802: add helpers to LogBuilder
SERVER-10717: use positional set for array appending
SERVER-6399: _okForStorage -- CodeWScope fix
SERVER-10803 Fix buildbot url capture in smoke.py on windows
SERVER-10804 Add more details to test report generated by smoke.py
SERVER-9441 do not allow distinct/aggregate without slaveOk
SERVER-7533 add _replMonitorStats() to get status from a ReplSetMonitor
SERVER-7533 added an _awaitRSHostViaRSMonitor method based on _replMonitorStats

updated jstests/sharding/read_pref_cmd.js to use this new method
SERVER-10026 enumeration as strategies, bug fixes galore, build plans
SERVER-4868: Record more in changelog

Added new changelog entries for movePrimary, addShard, shardCollection, removeShard
Added more info to moveChunk entry
SERVER-10726 Suppress warnings in build of internal v8
SERVER-10401 Disable new clang-3.4 warning