fixed double definition of unit attribute in CIF

VectoCore/VectoCore/Resources/XSD/VectoOutputCustomer.0.9.xsd

 <?xml version="1.0" encoding="UTF-8"?>
-<!-- edited with XMLSpy v2021 (x64) (http://www.altova.com) by Markus Quaritsch (Technische Universität Graz) -->
+<!-- edited with XMLSpy v2016 rel. 2 sp1 (x64) (http://www.altova.com) by Helmut Eichlseder (TU Graz/Inst. f. VKM und THD) -->
 <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns="urn:tugraz:ivt:VectoAPI:CustomerOutput:v0.9" xmlns:out="urn:tugraz:ivt:VectoAPI:DeclarationOutputDefinitions" xmlns:mrf="urn:tugraz:ivt:VectoAPI:DeclarationOutput:v0.9" xmlns:dd="urn:tugraz:ivt:VectoAPI:DeclarationDefinitions" xmlns:v2.0="urn:tugraz:ivt:VectoAPI:DeclarationDefinitions:v2.0" xmlns:v1.0="urn:tugraz:ivt:VectoAPI:DeclarationDefinitions:v1.0" xmlns:v2.1="urn:tugraz:ivt:VectoAPI:DeclarationDefinitions:v2.1" xmlns:v2.3="urn:tugraz:ivt:VectoAPI:DeclarationDefinitions:v2.3" xmlns:v2.4="urn:tugraz:ivt:VectoAPI:DeclarationDefinitions:v2.4" targetNamespace="urn:tugraz:ivt:VectoAPI:CustomerOutput:v0.9" elementFormDefault="qualified" attributeFormDefault="unqualified">
 	<xs:import namespace="urn:tugraz:ivt:VectoAPI:DeclarationDefinitions:v1.0" schemaLocation="VectoDeclarationDefinitions.1.0.xsd"/>
 	<xs:import namespace="urn:tugraz:ivt:VectoAPI:DeclarationDefinitions:v2.0" schemaLocation="VectoDeclarationDefinitions.2.0.xsd"/>
@@ -1175,9 +1175,7 @@
 			<xs:element name="TotalRatedPropulsionPower">
 				<xs:complexType>
 					<xs:simpleContent>
-						<xs:extension base="RatedPowerType">
-							<xs:attribute name="unit" type="out:PowerUnitType" use="required"/>
-						</xs:extension>
+						<xs:extension base="RatedPowerType"/>
 					</xs:simpleContent>
 				</xs:complexType>
 			</xs:element>
@@ -1188,7 +1186,6 @@
 							<xs:complexType>
 								<xs:sequence>
 									<xs:element name="MaxContinuousPropulsionPower" type="RatedPowerType"/>
-
 								</xs:sequence>
 								<xs:attribute name="voltage"/>
 							</xs:complexType>