Remove property, method, and if block related to unused donorId var
Remove property, method, and if block related to unused donorId var

The donorId var was used by this component when the geFormRenderer was
a child for determining visibility.  Visibility of the form is now
determined in the parent (GE_GiftEntry) component and the donorId is
retrieved by the geFormRenderer component directly.

SalesforceFoundation/Cumulus,SalesforceFoundation/Cumulus,SalesforceFoundation/Cumulus,SalesforceFoundation/Cumulus