HPCC-9805: ECL support for HTTP POST JSON and XML

Fix OSX compile error

Signed-off-by: Richard Chapman <rchapman@hpccsystems.com>

rtl/include/eclhelper.hpp

@@ -2217,10 +2217,6 @@ enum
     SOAPFxml            = 0x010000
 };
 
-enum
-{
-};
-
 struct IHThorWebServiceCallActionArg : public IHThorArg
 {
     virtual const char * getHosts() = 0;