Fix: Removed a dataset that is too big from the list used in PR acceptance test

[jcpitre]

Summary:

Closes #1587

Removed de-unknown-ulmer-eisenbahnfreunde-gtfs-1081 from the list of files used in the PR validation.
This file has over 40M shapes entries and it's just too big for the changes in #1553

Expected behavior:

The acceptance tests pass.

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[jcpitre]

Even with the worst "offender" removed, acceptance tests will take longer overall after #1553.
e.g. au-queensland-translink-brisbane-gtfs-1215 used to take 2:21 mins (see https://github.com/MobilityData/gtfs-validator/actions/runs/6249510665/job/16966559475) and is now 15:28 mins (see https://github.com/MobilityData/gtfs-validator/actions/runs/6328465567/job/17186892966)

This will also affect the web validator. Will users be patient? And will there be timeouts?

[github-actions]

✅ Rule acceptance tests passed.
New Errors: 0 out of 1477 datasets (~0%) are invalid due to code change, which is less than the provided threshold of 1%.
Dropped Errors: 0 out of 1477 datasets (~0%) are invalid due to code change, which is less than the provided threshold of 1%.
New Warnings: 0 out of 1477 datasets (~0%) are invalid due to code change, which is less than the provided threshold of 1%.
Dropped Warnings: 0 out of 1477 datasets (~0%) are invalid due to code change, which is less than the provided threshold of 1%.
0 out of 1477 sources (~0 %) are corrupted.
Commit: f5832dc
Download the full acceptance test report here (report will disappear after 90 days).
✅ Rule acceptance tests passed.

[jcpitre]

Here is a list of feeds that take a long time as found in the logs for the acceptance tests of the GH action:

9756 secs no-unknown-agder-kollektivtrafikk-as-gtfs-1078
2646 secs hu-unknown-volanbusz-gtfs-1836
1698 secs de-baden-wurttemberg-verkehrsverbund-rhein-neckar-gtfs-1173
1190 secs de-baden-wurttemberg-db-zugbus-regionalverkehr-alb-bodensee-gtfs-773
908 secs au-new-south-wales-train-replacement-bus-operators-gtfs-1322

I will add them to the list of skipped feeds.

[github-actions]

✅ Rule acceptance tests passed.
New Errors: 0 out of 1472 datasets (~0%) are invalid due to code change, which is less than the provided threshold of 1%.
Dropped Errors: 0 out of 1472 datasets (~0%) are invalid due to code change, which is less than the provided threshold of 1%.
New Warnings: 0 out of 1472 datasets (~0%) are invalid due to code change, which is less than the provided threshold of 1%.
Dropped Warnings: 0 out of 1472 datasets (~0%) are invalid due to code change, which is less than the provided threshold of 1%.
0 out of 1472 sources (~0 %) are corrupted.
Commit: 4faeeda
Download the full acceptance test report here (report will disappear after 90 days).
✅ Rule acceptance tests passed.

[davidgamez]

LGTM!