Remove warnings from mutable function arguments #59

Job	Run time
collect-crates	9s
test-crate (packages/macros)	22s
test-crate (examples/fungible-allowlist)	1m 8s
test-crate (packages/tokens)	1m 12s
test-crate (packages/test-utils/event-assertion)	44s
test-crate (packages/contract-utils)	1m 14s
test-crate (packages/access)	1m 0s
test-crate (examples/fungible-merkle-airdrop)	1m 1s
test-crate (examples/fungible-capped)	1m 6s
test-crate (examples/fungible-blocklist)	1m 4s
test-crate (examples/fungible-vault)	1m 8s
test-crate (examples/nft-access-control)	1m 4s
test-crate (examples/nft-consecutive)	2m 7s
test-crate (examples/fungible-pausable)	1m 5s
test-crate (examples/merkle-voting)	53s
test-crate (examples/nft-enumerable)	1m 20s
test-crate (examples/pausable)	1m 0s
test-crate (examples/nft-sequential-minting)	1m 3s
test-crate (examples/ownable)	1m 1s
test-crate (examples/sac-admin-generic)	59s
test-crate (examples/nft-royalties)	1m 6s
test-crate (examples/multisig/webauthn-verifier)	58s
test-crate (examples/multisig/ed25519-verifier)	1m 2s
test-crate (examples/multisig/account)	51s
test-crate (examples/multisig/spending-limit-policy)	59s
test-crate (packages/accounts)	1m 18s
test-crate (examples/multisig/threshold-policy)	59s
test-crate (examples/sac-admin-wrapper)	1m 12s
test-crate (examples/upgradeable/v1)	1m 6s
test-crate (examples/upgradeable/upgrader)	1m 18s
test-crate (packages/test-utils/default-impl-macro-test)	53s
test-crate (examples/upgradeable/v2)	49s
	33m 11s

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