feat: remove key from built-in commands taken by custom commands

[noahfraiture]

PR Description

Please check if the PR fulfills these requirements

• Cheatsheets are up-to-date (run go generate ./...)
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• Tests have been added/updated (see here for the integration test guide)
• Docs have been updated if necessary
• You've read through your own file changes for silly mistakes etc

This PR aims to remove the key in keybindings for commands for which the key doesn't work because it is superseeded by a custom command.
Another possibility is to replace the key by the crossed version of the string.