Revert "Add date range to licence"

[philipphofmann]

Reverts #2516

#skip-changelog

I'm sorry about the fuzz. We decided some time ago that we don't add date ranges to licenses in our internal Open Source Legal Policy.

cc @gavin-zee

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.16%. Comparing base (eb12987) to head (b8ec59e).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2518      +/-   ##
==========================================
- Coverage   69.61%   69.16%   -0.45%     
==========================================
  Files         125      125              
  Lines        4722     4722              
==========================================
- Hits         3287     3266      -21     
- Misses       1435     1456      +21     

Components	Coverage Δ
sentry-ruby	59.77% <ø> (-0.60%)	⬇️
sentry-rails	96.76% <ø> (ø)
sentry-sidekiq	97.09% <ø> (ø)
sentry-resque	92.85% <ø> (ø)
sentry-delayed_job	95.65% <ø> (ø)
sentry-opentelemetry	99.31% <ø> (ø)

see 4 files with indirect coverage changes