Removed unused modulebehavior struct and interface

src/NadekoBot/Common/ModuleBehaviors/IModuleBehavior.cs

@@ -1,33 +0,0 @@
-using Discord;
-using Discord.WebSocket;
-using System.Threading.Tasks;
-
-namespace NadekoBot.Common.ModuleBehaviors;
-
-public struct ModuleBehaviorResult
-{
-    public bool Blocked { get; set; }
-    public string NewInput { get; set; }
-
-    public static ModuleBehaviorResult None() => new ModuleBehaviorResult
-    {
-        Blocked = false,
-        NewInput = null,
-    };
-
-    public static ModuleBehaviorResult FromBlocked(bool blocked) => new ModuleBehaviorResult
-    {
-        Blocked = blocked,
-        NewInput = null,
-    };
-}
-
-public interface IModuleBehavior
-{
-    /// <summary>
-    /// Negative priority means it will try to apply as early as possible
-    /// Positive priority menas it will try to apply as late as possible
-    /// </summary>
-    int Priority { get; }
-    Task<ModuleBehaviorResult> ApplyBehavior(DiscordSocketClient client, IGuild guild, IUserMessage msg);
-}

src/NadekoBot/Modules/Nsfw/SearchImageCacher.cs

@@ -224,11 +224,11 @@ public class SearchImageCacher : INService
         }
         catch (HttpRequestException)
         {
-            return default;
         }
 
         if (!success)
             return default;
+        
         image = QueryLocal(tags, forceExplicit, type, blacklistedTags);
 
         return image;