Fix wrong include in devices.xsd

xml/devices.xsd

@@ -1,7 +1,5 @@
 <?xml version="1.0" encoding="ISO-8859-1"?>
 <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
-  <xsd:include schemaLocation="types.xsd"/>
-
   <xsd:simpleType name="hex16_t">
     <xsd:restriction base="xsd:string">
       <xsd:pattern value="([a-fA-F0-9]){4}"/>