refactor: remove unneeded abstract public methods

Author: paulbalandan

system/Database/BaseConnection.php

@@ -426,13 +426,6 @@ public function initialize()
         $this->connectDuration = microtime(true) - $this->connectTime;
     }
 
-    /**
-     * Connect to the database.
-     *
-     * @return mixed
-     */
-    abstract public function connect(bool $persistent = false);
-
     /**
      * Close the database connection.
      */
@@ -461,14 +454,6 @@ public function persistentConnect()
         return $this->connect(true);
     }
 
-    /**
-     * Keep or establish the connection if no queries have been sent for
-     * a length of time exceeding the server's idle timeout.
-     *
-     * @return mixed
-     */
-    abstract public function reconnect();
-
     /**
      * Returns the actual connection object. If both a 'read' and 'write'
      * connection has been specified, you can pass either term in to
@@ -483,13 +468,6 @@ public function getConnection(?string $alias = null)
         return $this->connID;
     }
 
-    /**
-     * Select a specific database table to use.
-     *
-     * @return mixed
-     */
-    abstract public function setDatabase(string $databaseName);
-
     /**
      * Returns the name of the current database being used.
      */
@@ -526,11 +504,6 @@ public function getPlatform(): string
         return $this->DBDriver;
     }
 
-    /**
-     * Returns a string containing the version of the database being used.
-     */
-    abstract public function getVersion(): string;
-
     /**
      * Sets the Table Aliases to use. These are typically
      * collected during use of the Builder, and set here