Revert "exporting createVariableNode proxy function for client."
Revert "exporting createVariableNode proxy function for client."

This reverts commit 670e038871de841536beb38f5d760f15f6f22a21.

open62541/open62541,AGIsmail/open62541,AGIsmail/open62541,jpfr/open62541,jpfr/open62541,StalderT/open62541,jpfr/open62541,JGrothoff/open62541,jpfr/open62541,open62541/open62541,StalderT/open62541,bostjanv/open62541,open62541/open62541,JGrothoff/open62541,bostjanv/open62541,open62541/open62541,JGrothoff/open62541,JGrothoff/open62541,StalderT/open62541,StalderT/open62541