remove stale badges

[3xtr4t3rr3str14l]

part of #2729

[codeclimate]

Code Climate has analyzed commit 601cb35 and detected 0 issues on this pull request.

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[wemeetagain]

As a followup, we should add a badge for the github action

[wemeetagain]

Looks like there's still some stale badges

[3xtr4t3rr3str14l]

do you think we should remove that eth2 spec version badge? on one hand, we'd have to update it every so often, but on the other hand, it might be a good thing to keep us in check and make sure we actually are up to spec. if we wanna keep it, i can go through the past version tags in https://github.com/ethereum/eth2.0-specs/tags since 0.12.1 and make sure we are up to spec (unless you already know if we are or not).

[wemeetagain]

I think we could just bump them all to 1.0.0, and once the altair release is locked down, then bump to 1.1.0

[github-actions]

Performance Report

✔️ no performance regression detected

Full benchmark results

Benchmark suite	Current: 1fd5724	Previous: 86f9cf2	Ratio
Process block - 250000 vs - with 0 validator exit	6.1025 ms/op	5.9033 ms/op	1.03
Process block - 250000 vs - with 1 validator exit	26.347 ms/op	26.176 ms/op	1.01
Process block - 250000 vs - with 16 validator exits	28.390 ms/op	26.550 ms/op	1.07
epoch - 250000 vs - processJustificationAndFinalization	122.87 us/op	121.67 us/op	1.01
epoch - 250000 vs - processRewardsAndPenalties	390.08 ms/op	360.27 ms/op	1.08
epoch - 250000 vs - processRegistryUpdates	11.070 us/op	10.913 us/op	1.01
epoch - 250000 vs - processSlashings	3.7764 ms/op	3.7023 ms/op	1.02
epoch - 250000 vs - processFinalUpdates	41.522 ms/op	40.482 ms/op	1.03
epoch - 250000 vs - prepareEpochProcessState	1.1278 s/op	1.0540 s/op	1.07
getAttestationDeltas - 250000 vs	175.05 ms/op	167.71 ms/op	1.04
processSlots - 250000 vs - 32 empty slots	2.1340 s/op	2.0508 s/op	1.04
shuffle list - 512 els	1.5461 ms/op	1.5719 ms/op	0.98
shuffle list - 16384 els	17.479 ms/op	17.542 ms/op	1.00
shuffle list - 250000 els	244.33 ms/op	245.94 ms/op	0.99
aggregationBits - 2048 els - readonlyValues	272.02 us/op	273.42 us/op	0.99
aggregationBits - 2048 els - zipIndexesInBitList	57.892 us/op	59.072 us/op	0.98
ssz.Root.equals	1.4190 us/op	1.3360 us/op	1.06
ssz.Root.equals with valueOf()	1.9840 us/op	1.7970 us/op	1.10
byteArrayEquals with valueOf()	1.8850 us/op	1.6790 us/op	1.12

by benchmarkbot/action