Remove unnecessary imports

Author: mbax

src/main/java/org/kitteh/irc/client/library/command/AwayCommand.java

@@ -29,8 +29,6 @@
 import org.kitteh.irc.client.library.util.Sanity;
 import org.kitteh.irc.client.library.util.ToStringer;
 
-import java.util.List;
-
 /**
  * Sends an AWAY request to the server.
  */

src/main/java/org/kitteh/irc/client/library/command/TagMessageCommand.java

@@ -24,7 +24,6 @@
 package org.kitteh.irc.client.library.command;
 
 import org.checkerframework.checker.nullness.qual.NonNull;
-import org.checkerframework.checker.nullness.qual.Nullable;
 import org.kitteh.irc.client.library.Client;
 import org.kitteh.irc.client.library.element.MessageReceiver;
 import org.kitteh.irc.client.library.util.Sanity;

src/main/java/org/kitteh/irc/client/library/defaults/DefaultClient.java

@@ -45,7 +45,6 @@
 import org.kitteh.irc.client.library.element.mode.ModeStatus;
 import org.kitteh.irc.client.library.element.mode.ModeStatusList;
 import org.kitteh.irc.client.library.element.mode.UserMode;
-import org.kitteh.irc.client.library.event.abstractbase.ClientReceiveServerMessageEventBase;
 import org.kitteh.irc.client.library.event.batch.ClientBatchEndEvent;
 import org.kitteh.irc.client.library.event.batch.ClientBatchMessageEvent;
 import org.kitteh.irc.client.library.event.batch.ClientBatchStartEvent;