Fix contact deletion

[asbiin]

Introduced with #971 : this line was missed in the new Contact::deleteEverything function:
https://github.com/monicahq/monica/pull/971/files#diff-da2c468a7e44d4976ad8308dbe22e7faL340

[codecov]

Codecov Report

Merging #1114 into master will increase coverage by 0.2%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##             master   #1114     +/-   ##
==========================================
+ Coverage      38.3%   38.5%   +0.2%     
  Complexity       11      11             
==========================================
  Files           195     195             
  Lines          5173    5174      +1     
==========================================
+ Hits           1979    1988      +9     
+ Misses         3194    3186      -8

Impacted Files	Coverage Δ	Complexity Δ
app/Contact.php	83% <100%> (+2.2%)	0 <0> (ø)	⬇️

---

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 2513137...08618c6. Read the comment docs.

[github-actions]

This pull request has been automatically locked since there
has not been any recent activity after it was closed.
Please open a new issue for related bugs.