Remove unused code

src/BaseCollection.php

@@ -2,10 +2,6 @@
 
 namespace Friendica;
 
-use Friendica\Database\Database;
-use Friendica\Database\DBA;
-use Psr\Log\LoggerInterface;
-
 /**
  * The Collection classes inheriting from this abstract class are meant to represent a list of database record.
  * The associated model class has to be provided in the child classes.

src/BaseModel.php

@@ -14,8 +14,6 @@ use Psr\Log\LoggerInterface;
  */
 abstract class BaseModel
 {
-	protected static $table_name;
-
 	/** @var Database */
 	protected $dba;
 	/** @var LoggerInterface */