ganeti-masterd: Remove unused locking code
ganeti-masterd: Remove unused locking code

Reviewed-by: iustinp, ultrotter


apyrgio/snf-ganeti,leshchevds/ganeti,andir/ganeti,mbakke/ganeti,leshchevds/ganeti,apyrgio/snf-ganeti,dimara/ganeti,andir/ganeti,ganeti-github-testing/ganeti-test-1,onponomarev/ganeti,yiannist/ganeti,onponomarev/ganeti,dimara/ganeti,grnet/snf-ganeti,mbakke/ganeti,ganeti/ganeti,apyrgio/ganeti,leshchevds/ganeti,ganeti/ganeti,bitemyapp/ganeti,yiannist/ganeti,mbakke/ganeti,grnet/snf-ganeti,ganeti-github-testing/ganeti-test-1,apyrgio/ganeti,andir/ganeti,ganeti/ganeti,yiannist/ganeti,bitemyapp/ganeti