remove unused file

Change-Id: Ie8b7c92d8bb6012fe55347fe72fa717c11ff890f

-package org.onlab.onos.store.device.impl;
-
-import static com.google.common.base.Preconditions.checkNotNull;
-
-import org.apache.commons.lang3.concurrent.ConcurrentException;
-import org.apache.commons.lang3.concurrent.ConcurrentInitializer;
-import org.onlab.onos.net.device.DeviceDescription;
-import org.onlab.onos.store.common.impl.Timestamped;
-
-// FIXME: consider removing this class
-public final class InitDeviceDescs
-    implements ConcurrentInitializer<DeviceDescriptions> {
-
-    private final Timestamped<DeviceDescription> deviceDesc;
-
-    public InitDeviceDescs(Timestamped<DeviceDescription> deviceDesc) {
-        this.deviceDesc = checkNotNull(deviceDesc);
-    }
-    @Override
-    public DeviceDescriptions get() throws ConcurrentException {
-        return new DeviceDescriptions(deviceDesc);
-    }
-}