Add ds:SPKIData element

Author: tvdijen

src/XML/ds/AbstractSPKIDataType.php

@@ -9,10 +9,8 @@
 use SimpleSAML\XML\Chunk;
 use SimpleSAML\XML\Exception\InvalidDOMElementException;
 use SimpleSAML\XML\Exception\SchemaViolationException;
-use SimpleSAML\XML\Exception\TooManyElementsException;
 use SimpleSAML\XML\Registry\ElementRegistry;
 use SimpleSAML\XML\SerializableElementInterface;
-use SimpleSAML\XML\XsNamespace as NS;
 use SimpleSAML\XMLSecurity\XML\ds\AbstractDsElement;
 
 /**