ref: Clean up unused imports

[kevinrenskers]

While looking into the OOM implementation I noticed these unused imports.

#skip-changelog

[philipphofmann]

If it compiles, LGTM

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1243.16 ms	1245.74 ms	2.58 ms
Size	20.51 KiB	333.10 KiB	312.59 KiB

Baseline results on branch: master

Startup times

Revision	Plain	With Sentry	Diff
0fdf0b2	1249.20 ms	1254.08 ms	4.88 ms
864c39a	1226.12 ms	1248.26 ms	22.13 ms
074350f	1241.00 ms	1249.60 ms	8.60 ms
0fdf0b2	1245.88 ms	1247.69 ms	1.82 ms
4a66f00	1224.73 ms	1241.14 ms	16.41 ms
864c39a	1191.14 ms	1233.38 ms	42.24 ms
e958899	1230.40 ms	1248.31 ms	17.91 ms
172c95a	1220.08 ms	1251.74 ms	31.66 ms
0fdf0b2	1266.27 ms	1277.90 ms	11.63 ms
b172a8b	1257.68 ms	1272.38 ms	14.70 ms

App size

Revision	Plain	With Sentry	Diff
0fdf0b2	20.51 KiB	332.90 KiB	312.39 KiB
864c39a	20.51 KiB	335.57 KiB	315.06 KiB
074350f	20.51 KiB	335.52 KiB	315.01 KiB
0fdf0b2	20.51 KiB	332.90 KiB	312.39 KiB
4a66f00	20.51 KiB	331.79 KiB	311.28 KiB
864c39a	20.51 KiB	335.57 KiB	315.06 KiB
e958899	20.51 KiB	331.92 KiB	311.41 KiB
172c95a	20.51 KiB	335.57 KiB	315.06 KiB
0fdf0b2	20.51 KiB	332.90 KiB	312.39 KiB
b172a8b	20.51 KiB	331.79 KiB	311.28 KiB

Previous results on branch: meta/cleanup-imports

Startup times

Revision	Plain	With Sentry	Diff
3cdf2b9	1220.65 ms	1241.48 ms	20.83 ms
a02211f	1216.50 ms	1251.68 ms	35.18 ms
b038dfd	1249.42 ms	1270.70 ms	21.28 ms

App size

Revision	Plain	With Sentry	Diff
3cdf2b9	20.51 KiB	333.10 KiB	312.59 KiB
a02211f	20.51 KiB	333.10 KiB	312.60 KiB
b038dfd	20.51 KiB	333.10 KiB	312.59 KiB