Core/Misc: Multiple static analysis issues fixed (small optimizations and clear code)

src/server/game/Entities/GameObject/GameObject.cpp

@@ -75,8 +75,7 @@ GameObject::~GameObject()
 
 bool GameObject::AIM_Initialize()
 {
-    if (m_AI)
-        delete m_AI;
+    delete m_AI;
 
     m_AI = FactorySelector::SelectGameObjectAI(this);