To remove the paralysing effect, just remove the lines between (and including) def pbAdditionalEffect(attacker,opponent) and the penultimate end. No need to add anything.
Hint: A method always begins with a line saying def something, and ends with a line saying end. To delete a method, delete those two lines and everything in between. Line indents are very helpful when deciding which end belongs with each def (the two should have the same amount of indent).