Core: SOme code cleanup, more to follow.

Source/Game/Spells/Skills/SkillDiscovery.cs

@@ -44,8 +44,8 @@ namespace Game.Spells
 
             uint count = 0;
 
-            StringBuilder ssNonDiscoverableEntries = new StringBuilder();
-            List<uint> reportedReqSpells = new List<uint>();
+            StringBuilder ssNonDiscoverableEntries = new();
+            List<uint> reportedReqSpells = new();
 
             do
             {
@@ -226,7 +226,7 @@ namespace Game.Spells
             return 0;
         }
 
-        static MultiMap<int, SkillDiscoveryEntry> SkillDiscoveryStorage = new MultiMap<int, SkillDiscoveryEntry>();
+        static MultiMap<int, SkillDiscoveryEntry> SkillDiscoveryStorage = new();
     }
 
     public class SkillDiscoveryEntry

Source/Game/Spells/Skills/SkillExtraItems.cs

@@ -71,7 +71,7 @@ namespace Game.Spells
                     continue;
                 }
 
-                SkillExtraItemEntry skillExtraItemEntry = new SkillExtraItemEntry();
+                SkillExtraItemEntry skillExtraItemEntry = new();
                 skillExtraItemEntry.requiredSpecialization = requiredSpecialization;
                 skillExtraItemEntry.additionalCreateChance = additionalCreateChance;
                 skillExtraItemEntry.additionalMaxNum = additionalMaxNum;
@@ -103,7 +103,7 @@ namespace Game.Spells
             return true;
         }
 
-        static Dictionary<uint, SkillExtraItemEntry> SkillExtraItemStorage = new Dictionary<uint,SkillExtraItemEntry>();
+        static Dictionary<uint, SkillExtraItemEntry> SkillExtraItemStorage = new();
     }
 
     class SkillExtraItemEntry
@@ -199,7 +199,7 @@ namespace Game.Spells
             return true;
         }
 
-        static Dictionary<uint, SkillPerfectItemEntry> SkillPerfectItemStorage = new Dictionary<uint, SkillPerfectItemEntry>();
+        static Dictionary<uint, SkillPerfectItemEntry> SkillPerfectItemStorage = new();
     }
 
     // struct to store information about perfection procs