Remove dupe-metric hack

[badboy]

I added a hack to get firefox-desktop to work properly again:

probe-scraper/probe_scraper/glean_checks.py

Lines 19 to 25 in 5717fce

	# Ugly hack to skip certain metrics which we know aren't duplicated,
	# but show up duplicated due to them being moved from one
	# to the other application/library.
	SKIP_METRICS = {
	"gecko.version": ["gecko", "pine", "firefox-desktop"],
	"gecko.build_id": ["gecko", "pine", "firefox-desktop"],
	}

We should find a way that this is not necessary.
It shouldn't. The metric is moved from the app to the library.

[BenWu]

This looks like it could be a similar issue that caused #711 so I'll append to this one. In that case, the metrics file was removed from mozillavpn_backend_cirrus and nimbus-cirrus was added as a dependency so in that case removing the metrics worked