Remove "primary" option from schema builder argument $options as it is not used anymore and triggers an exception

See doctrine/dbal@138eb85#diff-300f55366adb50a32a40882ebdc95c163b141f64cba5f45f20bda04a907b3eb3L82

Signed-off-by: Morris Jobke <hey@morrisjobke.de>

Author: MorrisJobke

lib/private/DB/MDB2SchemaReader.php

@@ -260,8 +260,16 @@ private function loadField($table, $xml) {
 				$options['primary'] = true;
 			}
 
-			$table->addColumn($name, $type, $options);
+			# not used anymore in the options argument
+			# see https://github.com/doctrine/dbal/commit/138eb85234a1faeaa2e6a32cd7bcc66bb51c64e8#diff-300f55366adb50a32a40882ebdc95c163b141f64cba5f45f20bda04a907b3eb3L82
+			# therefore it's read before and then unset right before the addColumn call
+			$setPrimaryKey = false;
 			if (!empty($options['primary']) && $options['primary']) {
+				$setPrimaryKey = true;
+			}
+			unset($options['primary']);
+			$table->addColumn($name, $type, $options);
+			if ($setPrimaryKey) {
 				$table->setPrimaryKey([$name]);
 			}
 		}