The fact that the Energy label for luminaires is discontinued means that there has been no obligation for luminaires to bear an Energy label since 25 December 2019. This is stated in Article 9 of Commission Delegated Regulation (EU) 2019/2015 as follows:
'Delegated Regulation (EU) 874/2012 is repealed with effect from 1 September 2021, with the exception of paragraph 2 of Article 3 and paragraph 2 of Article 4 which are repealed with effect from 25 December 2019.' Therefore, there are no Energy Labelling provisions dedicated to luminaires after 25 December 2019. Stocks placed on the market before 25 December 2019 can stay indefinitely and there is no need to remove/cancel/hide the EU Energy label.
It is to be noted that certain luminaires could meet the definition of light source in the latest Energy Labelling act Commission Delegated Regulation (EU) 2019/2015 and thus be required to bear an Energy label according to it.
Disclaimer: Please note that the European Commission cannot provide a legally binding interpretation of the EU legislation, as this is the sole competence of the European Court of Justice. Any remarks from the European Commission services are without prejudice to the position the Commission might take should related cases arise in a procedure before the Court of Justice.