Fix previously plagiarized skill re-appearing after relog, when removed prior

[skyleo]

Pull Request Prelude

• I have followed proper Hercules code styling.
• I have read and understood the contribution guidelines before making this PR.
• I am aware that this PR may be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

Ensure that on relog the previously removed plagiarized skill doesn't get re-added.

This was due to failure to clear the remembered cloneskill script variables and such.

As by the comment [Aegis] can't overwrite skill of higher level, but will still remove previously copied skill. this is official behavior, that if you had a plagiarized spell, something would attack you with for example Envenom 3, when you have Envenom 10, you'd then lose the plagiarized spell but not have your higher level Envenom overwritten.

That being said I may consider changing it so that if it tries to copy the same level nothing happens. Or re-check if in Aegis this really will result in the removal as well, in case I missed the == case.

Issues addressed: None