Fix double PR notification from API

[jolheiser]

NotifyNewPullRequest is already called in the service:

gitea/services/pull/pull.go

Line 50 in 084a2b0

notification.NotifyNewPullRequest(pr)

[codecov-io]

Codecov Report

Merging #10482 into master will decrease coverage by 0.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master   #10482      +/-   ##
==========================================
- Coverage   43.72%    43.7%   -0.02%     
==========================================
  Files         586      586              
  Lines       81408    81408              
==========================================
- Hits        35592    35576      -16     
- Misses      41407    41425      +18     
+ Partials     4409     4407       -2

Impacted Files	Coverage Δ
routers/routes/routes.go	86.27% <100%> (ø)	⬆️
models/repo_mirror.go	2.12% <0%> (-10.64%)	⬇️
services/pull/check.go	50% <0%> (-6.71%)	⬇️
modules/git/command.go	86.95% <0%> (-2.61%)	⬇️
services/pull/temp_repo.go	29.05% <0%> (-2.57%)	⬇️
services/pull/patch.go	60.37% <0%> (-2.52%)	⬇️
modules/log/event.go	64.61% <0%> (-1.03%)	⬇️
services/mirror/mirror.go	18.75% <0%> (-0.66%)	⬇️
modules/git/repo.go	47.7% <0%> (+0.91%)	⬆️
modules/queue/unique_queue_disk_channel.go	55.76% <0%> (+1.92%)	⬆️
... and 3 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 4a1060b...71bb0e6. Read the comment docs.