fs: dlm:Remove unneeded semicolon

Eliminate the following coccinelle check warning:
fs/dlm/midcomms.c:972:2-3
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Zhang Mingyu <zhang.mingyu@zte.com.cn>
Signed-off-by: David Teigland <teigland@redhat.com>

fs/dlm/midcomms.c

@@ -969,7 +969,7 @@ void dlm_midcomms_receive_done(int nodeid)
 		spin_unlock(&node->state_lock);
 		/* do nothing FIN has it's own ack send */
 		break;
-	};
+	}
 	srcu_read_unlock(&nodes_srcu, idx);
 }