Revert "Core/Spells: Also Death Runes itself should be able to turn into a Death Rune. They should not turn back into their original rune when using a spell that turns the used runes into Death Runes." - it is causing crashes.

This reverts commit 17b89ea8ab.

src/server/game/Entities/Unit/Unit.cpp

@@ -8054,6 +8054,9 @@ bool Unit::HandleAuraProc(Unit* victim, uint32 damage, Aura* triggeredByAura, Sp
                     if (plr->getClass() != CLASS_DEATH_KNIGHT)
                         return false;
 
+                    // can't proc from death rune use
+                    if (rune == RUNE_DEATH)
+                        return false;
                     AuraEffect* aurEff = triggeredByAura->GetEffect(EFFECT_0);
                     if (!aurEff)
                         return false;