Remove request-resolver-ref in 6.0

Issue gh-11896

config/src/main/resources/org/springframework/security/config/spring-security-6.0.rnc

@@ -1126,9 +1126,6 @@ csrf-options.attlist &=
 csrf-options.attlist &=
 	## The CsrfTokenRequestHandler to use. The default is CsrfTokenRequestProcessor.
 	attribute request-handler-ref { xsd:token }?
-csrf-options.attlist &=
-	## The CsrfTokenRequestResolver to use. The default is CsrfTokenRequestProcessor.
-	attribute request-resolver-ref { xsd:token }?
 
 headers =
 ## Element for configuration of the HeaderWritersFilter. Enables easy setting for the X-Frame-Options, X-XSS-Protection and X-Content-Type-Options headers.

config/src/main/resources/org/springframework/security/config/spring-security-6.0.xsd

@@ -3168,13 +3168,7 @@
       </xs:attribute>
       <xs:attribute name="request-handler-ref" type="xs:token">
          <xs:annotation>
-            <xs:documentation>The CsrfTokenRequestHandler to use. The default is CsrfTokenRequestProcessor.
-                </xs:documentation>
-         </xs:annotation>
-      </xs:attribute>
-      <xs:attribute name="request-resolver-ref" type="xs:token">
-         <xs:annotation>
-            <xs:documentation>The CsrfTokenRequestResolver to use. The default is CsrfTokenRequestProcessor.
+            <xs:documentation>The CsrfTokenRequestHandler to use. The default is CsrfTokenRepositoryRequestHandler.
                 </xs:documentation>
          </xs:annotation>
       </xs:attribute>