Fix Make Sub-Resources Unique shortcut focus

[Yelloween10]

After a shortcut is assigned by the user, the assigned shortcut for "Make Sub-Resources Unique" wasn't working unless the user focused on the inspector tab. This made the shortcut ineffective, as the user would already need to interact with the tab where the operation could be performed manually.

• Removed the line responsible for setting the shortcut context.

Tested by trying the assigned shortcut without focusing on the inspector tab.

Fixes #93038

[KoBeWi]

After more testing, looks like this causes the shortcut to fire when potentially undesired, e.g. when the filter field in editor log has focus. The menu does not have default shortcuts though, so maybe it's not a problem, idk.

[Yelloween10]

I don't think it will cause problems since it doesn't have a default shortcut.
How else could it be fixed?

[KoBeWi]

I can't think of a better solution right now.

[KoBeWi]

It fixes the issue, with the caveat mentioned above.
It won't cause serious problems, so we don't need a better fix for now.

[Repiteo]

Thanks!