all: remove redundant conversions and import names (#21903)

accounts/abi/reflect_test.go

accounts/abi/type_test.go

accounts/accounts.go

accounts/keystore/passphrase.go

accounts/keystore/wallet.go

accounts/scwallet/wallet.go

accounts/usbwallet/wallet.go

cmd/clef/main.go

cmd/devp2p/dnscmd.go

cmd/evm/compiler.go

cmd/evm/disasm.go

cmd/evm/runner.go

cmd/evm/staterunner.go

cmd/geth/config.go

cmd/geth/main.go

cmd/geth/usage.go

cmd/puppeth/genesis.go

cmd/utils/flags.go

common/hexutil/json_test.go

consensus/ethash/ethash.go