Update SpellAuraEffects.cpp

Cleanup. Already in spell scripts.
Merge pull request #12299 from SeTM/patch-1

Update SpellAuraEffects.cpp
Core/Spells fix 0442ff5c991c351cd6da3c04d1768f756d09fe22

Let it apply only to players
Core/Pets: Fixed pet power regeneration

Closes #12292
Merge pull request #12301 from Unholychick/patch-3

Core/Spells fix 0442ff5c991c351cd6da3c04d1768f756d09fe22
Scripts/Misc: Fixed training dummies not entering combat
Merge branch 'master' of https://github.com/Tangol/TrinityCore