Fix OPENDJ-525: Remove compiler warnings when building using JDK7

Matthew Swift

19.15.2012 85dbc832a61c6a3239854af370ad73c418f18b5e

 opends/src/server/org/opends/server/extensions/FIFOEntryCache.java

@@ -704,7 +704,6 @@
        if ((entriesDeleted % 1000)  == 0)
        {
          cacheWriteLock.unlock();
          Thread.currentThread();
          Thread.yield();
          cacheWriteLock.lock();
        }
@@ -812,7 +811,6 @@
      if ((entriesExamined % 1000) == 0)
      {
        cacheWriteLock.unlock();
        Thread.currentThread();
        Thread.yield();
        cacheWriteLock.lock();
      }