Remove duplicated list of contracts in the release tooling

[martinvol]

Expected Behavior

Core smart contracts shouldn't be redefined many times.

Current Behavior

They are defined in multiple places for multiple proposes, for example:

• https://github.com/celo-org/celo-monorepo/blob/master/packages/protocol/migrations_ts/27_governance.ts#L88

[martinvol]

This one is related with https://github.com/celo-org/celo-monorepo/issues/10564

[github-actions[bot]]

This issue is stale and will be closed in 30 days without activity