Cleanups for Shaman weapon enchant refactor (#2315)

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## Pull Request Description
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I forgot to include some clean-ups relating to the recent commit to
refactor Shaman weapon enchants. This is just deleting some now unneeded
code and cleaning up a bit of other code.


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---------

Co-authored-by: Keleborn <22352763+Celandriel@users.noreply.github.com>
Co-authored-by: bash <hermensb@gmail.com>
Co-authored-by: Revision <tkn963@gmail.com>
Co-authored-by: kadeshar <kadeshar@gmail.com>

src/Ai/Base/Value/ItemForSpellValue.cpp

@@ -48,23 +48,6 @@ Item* ItemForSpellValue::Calculate()
         }
     }
 
-    // Workaround as some spells have no item mask (e.g. shaman weapon enhancements)
-    if (!strcmpi(spellInfo->SpellName[0], "rockbiter weapon") ||
-        !strcmpi(spellInfo->SpellName[0], "flametongue weapon") ||
-        !strcmpi(spellInfo->SpellName[0], "earthliving weapon") ||
-        !strcmpi(spellInfo->SpellName[0], "frostbrand weapon") || !strcmpi(spellInfo->SpellName[0], "windfury weapon"))
-    {
-        itemForSpell = GetItemFitsToSpellRequirements(EQUIPMENT_SLOT_MAINHAND, spellInfo);
-        if (itemForSpell && itemForSpell->GetTemplate()->Class == ITEM_CLASS_WEAPON)
-            return itemForSpell;
-
-        itemForSpell = GetItemFitsToSpellRequirements(EQUIPMENT_SLOT_OFFHAND, spellInfo);
-        if (itemForSpell && itemForSpell->GetTemplate()->Class == ITEM_CLASS_WEAPON)
-            return itemForSpell;
-
-        return nullptr;
-    }
-
     if (!(spellInfo->Targets & TARGET_FLAG_ITEM))
         return nullptr;
 

src/Ai/Base/Value/SpellCastUsefulValue.cpp

@@ -40,13 +40,13 @@ bool SpellCastUsefulValue::Calculate()
         return false;
     }
 
-    // TODO: workaround
+    if (qualifier == "windfury weapon" || qualifier == "flametongue weapon" ||
-    if (qualifier == "windfury weapon" || qualifier == "flametongue weapon" || qualifier == "frostbrand weapon" ||
+        qualifier == "frostbrand weapon" ||  qualifier == "rockbiter weapon" ||
-        qualifier == "rockbiter weapon" || qualifier == "earthliving weapon" || qualifier == "spellstone")
+        qualifier == "earthliving weapon" || qualifier == "spellstone")
     {
-        if (Item* item = AI_VALUE2(Item*, "item for spell", spellid))
+        if (Item* item = AI_VALUE2(Item*, "item for spell", spellid);
-            if (item->IsInWorld() && item->GetEnchantmentId(TEMP_ENCHANTMENT_SLOT))
+            item && item->IsInWorld() && item->GetEnchantmentId(TEMP_ENCHANTMENT_SLOT))
-                return false;
+            return false;
     }
 
     std::set<uint32>& skipSpells = AI_VALUE(std::set<uint32>&, "skip spells list");