fix(flareresolverr): remove persistance config from flare

[jlpedrosa]

Description
I don't have a lot of context, I just saw that in flare the persistance config was on the yaml, but there was not pvc/pv.

Linked issue(s)

Fixes #0000 | Relates #0000

Checklist

• Unit tests updated
• End user documentation updated

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[M0NsTeRRR]

Good catch, thanks for you PR !