[PWGJE] Remove Pythia from hadron-photon correlation task

[pestratm]

Removed the PYTHIA dependency from the hadron-photon correlation task @nzardosh

[github-actions]

O2 linter results: ❌ 1 errors, ⚠️ 0 warnings, 🔕 2 disabled

[vkucera]

Thanks @pestratm for getting rid of the PYTHIA events in the compilation.
What is the next step?

[pestratm]

Hi @vkucera. Since the idea behind the analysis is to reconstruct decay photons by simulating decays of neutral hadrons (which in a further step are approximated by the distribution of charged pions), it relies on using PYTHIA. Because of this, the next step would be to replace the PYTHIA dependency in the task itself by using on-the-fly simulations on Hyperloop. As I am currently in the process of finishing my thesis, I would, however, only be able to address this at a later point.

[nzardosh]

Thanks for fixing this @pestratm !