config:env:delete
Remove a configuration from the env.php file by providing a key.
Sub-arrays in config.php can be specified by adding a "." character to every array.
n98-magerun2.phar config:env:delete <key>
Examples:
n98-magerun2.phar config:env:delete system
n98-magerun2.phar config:env:delete cache.frontend.default.backend
n98-magerun2.phar config:env:delete cache.frontend.default.backend_options