Removed some useless code

src/NadekoBot.Coordinator/Services/CoordinatorService.cs

@@ -111,11 +111,10 @@ namespace NadekoBot.Coordinator
             return new DieReply();
         }
 
-        public override async Task<SetConfigTextReply> SetConfigText(SetConfigTextRequest request, ServerCallContext context)
+        public override Task<SetConfigTextReply> SetConfigText(SetConfigTextRequest request, ServerCallContext context)
         {
-            await Task.Yield();
-            string error = string.Empty;
-            bool success = true;
+            var error = string.Empty;
+            var success = true;
             try
             {
                 _runner.SetConfigText(request.ConfigYml);
@@ -126,11 +125,11 @@ namespace NadekoBot.Coordinator
                 success = false;
             }
 
-            return new(new()
+            return Task.FromResult<SetConfigTextReply>(new(new()
             {
                 Success = success,
                 Error = error
-            });
+            }));
         }
 
         public override Task<GetConfigTextReply> GetConfigText(GetConfigTextRequest request, ServerCallContext context)

src/NadekoBot/Modules/Gambling/Events/GameStatusEvent.cs

@@ -125,13 +125,12 @@ public class GameStatusEvent : ICurrencyEvent
             await StopEvent();
     }
 
-    public async Task StopEvent()
+    public Task StopEvent()
     {
-        await Task.Yield();
         lock (_stopLock)
         {
             if (Stopped)
-                return;
+                return Task.CompletedTask;
             Stopped = true;
             _client.MessageDeleted -= OnMessageDeleted;
             _client.MessageReceived -= HandleMessage;
@@ -146,6 +145,8 @@ public class GameStatusEvent : ICurrencyEvent
 
             _ = OnEnded?.Invoke(_guild.Id);
         }
+
+        return Task.CompletedTask;
     }
 
     private Task HandleMessage(SocketMessage message)

src/NadekoBot/Modules/Gambling/Events/ReactionEvent.cs

@@ -122,13 +122,13 @@ public class ReactionEvent : ICurrencyEvent
             await StopEvent();
     }
 
-    public async Task StopEvent()
+    public Task StopEvent()
     {
-        await Task.Yield();
         lock (_stopLock)
         {
             if (Stopped)
-                return;
+                return Task.CompletedTask;
+            
             Stopped = true;
             _client.MessageDeleted -= OnMessageDeleted;
             _client.ReactionAdded -= HandleReaction;
@@ -142,6 +142,8 @@ public class ReactionEvent : ICurrencyEvent
 
             _ = OnEnded?.Invoke(_guild.Id);
         }
+
+        return Task.CompletedTask;
     }
 
     private Task HandleReaction(

src/NadekoBot/Modules/Permissions/PermissionsService.cs

@@ -102,7 +102,6 @@ public class PermissionService : ILateBlocker, INService
         var channel = ctx.Channel;
         var commandName = command.Name.ToLowerInvariant();
 
-        await Task.Yield();
         if (guild is null)
             return false;
 

src/NadekoBot/Services/Impl/GoogleApiService.cs

@@ -197,12 +197,12 @@ public class GoogleApiService : IGoogleApiService, INService
     // todo future add quota users
     public async Task<IEnumerable<string>> GetRelatedVideosAsync(string id, int count = 1)
     {
-        await Task.Yield();
         if (string.IsNullOrWhiteSpace(id))
             throw new ArgumentNullException(nameof(id));
 
         if (count <= 0)
             throw new ArgumentOutOfRangeException(nameof(count));
+        
         var query = _yt.Search.List("snippet");
         query.MaxResults = count;
         query.RelatedToVideoId = id;
@@ -212,7 +212,6 @@ public class GoogleApiService : IGoogleApiService, INService
 
     public async Task<IEnumerable<string>> GetVideoLinksByKeywordAsync(string keywords, int count = 1)
     {
-        await Task.Yield();
         if (string.IsNullOrWhiteSpace(keywords))
             throw new ArgumentNullException(nameof(keywords));
 
@@ -231,7 +230,6 @@ public class GoogleApiService : IGoogleApiService, INService
         string keywords,
         int count = 1)
     {
-        await Task.Yield();
         if (string.IsNullOrWhiteSpace(keywords))
             throw new ArgumentNullException(nameof(keywords));
 
@@ -251,7 +249,6 @@ public class GoogleApiService : IGoogleApiService, INService
 
     public async Task<string> ShortenUrl(string url)
     {
-        await Task.Yield();
         if (string.IsNullOrWhiteSpace(url))
             throw new ArgumentNullException(nameof(url));
 
@@ -280,7 +277,6 @@ public class GoogleApiService : IGoogleApiService, INService
 
     public async Task<IEnumerable<string>> GetPlaylistTracksAsync(string playlistId, int count = 50)
     {
-        await Task.Yield();
         if (string.IsNullOrWhiteSpace(playlistId))
             throw new ArgumentNullException(nameof(playlistId));
 
@@ -312,7 +308,6 @@ public class GoogleApiService : IGoogleApiService, INService
 
     public async Task<IReadOnlyDictionary<string, TimeSpan>> GetVideoDurationsAsync(IEnumerable<string> videoIds)
     {
-        await Task.Yield();
         var videoIdsList = videoIds as List<string> ?? videoIds.ToList();
 
         var toReturn = new Dictionary<string, TimeSpan>();
@@ -339,7 +334,6 @@ public class GoogleApiService : IGoogleApiService, INService
 
     public async Task<ImageResult> GetImageAsync(string query)
     {
-        await Task.Yield();
         if (string.IsNullOrWhiteSpace(query))
             throw new ArgumentNullException(nameof(query));
 
@@ -359,7 +353,6 @@ public class GoogleApiService : IGoogleApiService, INService
 
     public async Task<string> Translate(string sourceText, string sourceLanguage, string targetLanguage)
     {
-        await Task.Yield();
         string text;
 
         if (!Languages.ContainsKey(sourceLanguage) || !Languages.ContainsKey(targetLanguage))