Remove ed25519 precompile

[gastonponti]

Description

Remove the CIP-25 as part of the CIP: https://github.com/celo-org/celo-proposals/discussions/392

Backwards compatibility

Part of the Gingerbread P2 Hard Fork

[github-actions[bot]]

Coverage from tests in ./e2e_test/... for ./consensus/istanbul/... at commit 0404e7a36356441c4d543311409bda87c4bcaa0c

coverage: 50.8% of statements across all listed packages

coverage:  63.2% of statements in consensus/istanbul
coverage:  42.7% of statements in consensus/istanbul/announce
coverage:  55.8% of statements in consensus/istanbul/backend
coverage:   0.0% of statements in consensus/istanbul/backend/backendtest
coverage:  24.3% of statements in consensus/istanbul/backend/internal/replica
coverage:  65.2% of statements in consensus/istanbul/core
coverage:  50.0% of statements in consensus/istanbul/db
coverage:   0.0% of statements in consensus/istanbul/proxy
coverage:  64.4% of statements in consensus/istanbul/uptime
coverage:  51.8% of statements in consensus/istanbul/validator
coverage:  79.2% of statements in consensus/istanbul/validator/random

[github-actions[bot]]

Test failures:
TestEthersJSCompatibilityDisableAfterGingerbread: e2e_test Checking getExchangeSpenders. spenders = [0x000000000000000000000000000000000000d028] Checking medianRate. numerator = 1000000000000000000000000 denominator = 1000000000000000000000000 Checking gas price minimum. cusdValue = 100000000 Checking getExchangeSpenders. spenders = [0x000000000000000000000000000000000000d028] Checking medianRate. numerator = 1000000000000000000000000 denominator = 1000000000000000000000000 Checking gas price minimum. cusdValue = 100000000 e2e_test.go:742: e2e_test.go:744:
This test report was produced by the test-summary action.  Made with ❤️ in Cambridge.

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: +0.08% :tada:

Comparison is base (1c5df77) 55.16% compared to head (520158f) 55.24%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2177 +/- ## ========================================== + Coverage 55.16% 55.24% +0.08% ========================================== Files 676 676 Lines 114015 114015 ========================================== + Hits 62895 62989 +94 + Misses 47242 47177 -65 + Partials 3878 3849 -29 ``` | [Files Changed](https://app.codecov.io/gh/celo-org/celo-blockchain/pull/2177?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=celo-org) | Coverage Δ | | |---|---|---| | [core/vm/contracts.go](https://app.codecov.io/gh/celo-org/celo-blockchain/pull/2177?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=celo-org#diff-Y29yZS92bS9jb250cmFjdHMuZ28=) | `80.65% <ø> (ø)` | | ... and [28 files with indirect coverage changes](https://app.codecov.io/gh/celo-org/celo-blockchain/pull/2177/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=celo-org)

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