ref: Remove unused crc32ofString

[philipphofmann]

Remove unused sentry_crc32ofString including tests.

#skip-changelog

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1227.19 ms	1248.87 ms	21.68 ms
Size	21.90 KiB	726.11 KiB	704.21 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
ddb4778	1245.36 ms	1254.16 ms	8.80 ms
020745f	1222.64 ms	1253.54 ms	30.90 ms
18d491a	1229.78 ms	1252.67 ms	22.90 ms
077e940	1227.31 ms	1246.51 ms	19.20 ms
c319795	1256.18 ms	1266.87 ms	10.69 ms
cc31630	1235.22 ms	1252.51 ms	17.29 ms
94e1968	1234.41 ms	1252.63 ms	18.22 ms
216bdf9	1202.57 ms	1215.45 ms	12.88 ms
bb5dc7d	1240.44 ms	1266.45 ms	26.01 ms
46f5eb8	1200.09 ms	1231.38 ms	31.29 ms

App size

Revision	Plain	With Sentry	Diff
ddb4778	21.58 KiB	414.92 KiB	393.34 KiB
020745f	22.84 KiB	403.13 KiB	380.29 KiB
18d491a	21.58 KiB	544.87 KiB	523.29 KiB
077e940	21.58 KiB	706.97 KiB	685.39 KiB
c319795	20.76 KiB	431.99 KiB	411.22 KiB
cc31630	21.58 KiB	694.58 KiB	672.99 KiB
94e1968	21.58 KiB	614.74 KiB	593.15 KiB
216bdf9	21.58 KiB	418.13 KiB	396.54 KiB
bb5dc7d	22.85 KiB	412.98 KiB	390.13 KiB
46f5eb8	20.76 KiB	432.37 KiB	411.61 KiB

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.433%. Comparing base (522f8da) to head (de6ebe2).
Report is 4 commits behind head on main.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #4507       +/-   ##
=============================================
- Coverage   91.436%   91.433%   -0.004%     
=============================================
  Files          616       615        -1     
  Lines        68863     68847       -16     
  Branches     24707     24703        -4     
=============================================
- Hits         62966     62949       -17     
- Misses        5803      5805        +2     
+ Partials        94        93        -1     

Files with missing lines	Coverage Δ
Sources/Sentry/SentryNSDataUtils.m	97.619% <ø> (-0.208%)	⬇️

... and 5 files with indirect coverage changes

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