Merge pull request qgis#57754 from agiudiceandrea/fix-57751-dbmanager…

…-delete-raster-gpkg

[DB Manager] Fix delete raster layer in GeoPackage (Fix qgis#57751)

python/plugins/db_manager/db_plugins/gpkg/connector.py

@@ -587,7 +587,9 @@ def createTable(self, table, field_defs, pkey):
     def deleteTable(self, table):
         """Deletes table from the database """
         if self.isRasterTable(table):
-            return False
+            sql = "DROP TABLE {}".format(self.quoteId(table))
+            self._execute_and_commit(sql)
+            return True
 
         _, tablename = self.getSchemaTableName(table)
         for i in range(self.gdal_ds.GetLayerCount()):