unloadwallet ( "wallet_name" )

The unloadwallet RPC unloads the wallet referenced by the request endpoint otherwise unloads the wallet specified in the argument.

*bitcoin-cli help unloadwallet

unloadwallet ( "wallet_name" )
Unloads the wallet referenced by the request endpoint otherwise unloads the wallet specified in the argument.
Specifying the wallet name on a wallet endpoint is invalid.
Arguments:
1. "wallet_name"    (string, optional) The name of the wallet to unload.

Examples:
> bitcoin-cli unloadwallet wallet_name
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "unloadwallet", "params": [wallet_name] }' -H 'content-type: text/plain;' http://127.0.0.1:8332/