Remove duplicate of code (#153)

src/ConnectionPDO.php

@@ -89,24 +89,4 @@ public function getSchema(): SchemaInterface
 
         return $this->schema;
     }
-
-    /**
-     * Initializes the DB connection.
-     *
-     * This method is invoked right after the DB connection is established.
-     *
-     * The default implementation turns on `PDO::ATTR_EMULATE_PREPARES`.
-     *
-     * if {@see emulatePrepare} is true, and sets the database {@see charset} if it is not empty.
-     *
-     * It then triggers an {@see EVENT_AFTER_OPEN} event.
-     */
-    protected function initConnection(): void
-    {
-        if ($this->getEmulatePrepare() !== null) {
-            $this->driver->attributes([PDO::ATTR_EMULATE_PREPARES => $this->getEmulatePrepare()]);
-        }
-
-        $this->pdo = $this->driver->createConnection();
-    }
 }