Removing the incorrectly set uID in vesselStructureType (thanks @svengoldberg)

Author: MarAlder

schema/cpacs_schema.xsd

@@ -40521,7 +40521,6 @@ The fuel tank volume type should also be used for the wing fuel tank</xsd:docume
                     <xsd:element name="skinLayers" minOccurs="0" type="vesselSkinLayersType"/>
                     <xsd:element name="walls" minOccurs="0" type="wallsType"/>
                 </xsd:all>
-                <xsd:attribute name="uID" use="required" type="xsd:ID"/>
             </xsd:extension>
         </xsd:complexContent>
     </xsd:complexType>