Revert "CP-17231: Implemented proxy authentication in C# SDK"
Revert "CP-17231: Implemented proxy authentication in C# SDK"

stephen-turner/xen-api-sdk,stephen-turner/xen-api-sdk,xapi-project/xen-api-sdk,xapi-project/xen-api-sdk,kc284/xen-api-sdk,kc284/xen-api-sdk,xapi-project/xen-api-sdk,kc284/xen-api-sdk,kc284/xen-api-sdk,xapi-project/xen-api-sdk,xapi-project/xen-api-sdk,stephen-turner/xen-api-sdk,kc284/xen-api-sdk,stephen-turner/xen-api-sdk,stephen-turner/xen-api-sdk,stephen-turner/xen-api-sdk,xapi-project/xen-api-sdk,kc284/xen-api-sdk