redundancy suppression for Toxic Spores ability [bounty: 4 XTR]

[DreadKnight]

These should be some combat log message suppression for Uncle Fungus' passive ability, Toxic Spores, so that when some unit hits Uncle Fungus using melee attack & triggers the passive, it shouldn't show "Uncle Fungus uses Toxic Spores" too.

Similar to how Nutcase's Tentacle Bush passive does things #1947