I'd like to remove some, but not all, of the existing keyboard shortcuts, but there does not seem to be any way to do this in the settings dialog.
A workaround I found was binding each undesired action to the same key, clicking "Ok" on the prompt to unbind the existing action every time, then finally rebinding some desired action to the same key to get rid of the final undesired action, and then resetting the binding of the desired action.
In Preferences | Shortcuts click on the shortcut you want to remove and hit the backspace key, the shortcut should now show disabled.
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In Preferences | Shortcuts click on the shortcut you want to remove and hit the backspace key, the shortcut should now show
disabled.