disable fees sysvar

Active on mainnet-beta (epoch 483), testnet (epoch 507) and devnet (epoch 543).

Introduced in solana-labs/solana PR #18981.

Feature id JAN1trEUEtZjgXYzNBYHU9DYd7GnThhXfFP7SzPXkPsG.

Vortex

• Consensus leaderboard
• Fees leaderboard
• Validators
• Stake pools
• Decentralization
• Client versions
• Cluster status
• Governance
• Feature gates
• SIMDs
• Activity
• API and AI usage