Remove empty constructors

Close #3650

src/Lidarr.Http/ApiInfoController.cs

@@ -5,10 +5,6 @@ namespace Lidarr.Http
 {
     public class ApiInfoController : Controller
     {
-        public ApiInfoController()
-        {
-        }
-
         [HttpGet("/api")]
         [Produces("application/json")]
         public object GetApiInfo()

src/NzbDrone.Core/Datastore/Converters/KeyValuePairConverter.cs

@@ -50,10 +50,6 @@ namespace NzbDrone.Core.Datastore.Converters
         private class KeyValuePairConverterInner<TKey, TValue> :
             JsonConverter<KeyValuePair<TKey, TValue>>
         {
-            public KeyValuePairConverterInner()
-            {
-            }
-
             public override KeyValuePair<TKey, TValue> Read(
                 ref Utf8JsonReader reader,
                 Type typeToConvert,

src/NzbDrone.Core/Download/DownloadsProcessedEvent.cs

@@ -1,11 +1,8 @@
-using NzbDrone.Common.Messaging;
+using NzbDrone.Common.Messaging;
 
 namespace NzbDrone.Core.Download
 {
     public class DownloadsProcessedEvent : IEvent
     {
-        public DownloadsProcessedEvent()
-        {
-        }
     }
 }

src/NzbDrone.Core/ImportLists/LidarrLists/LidarrListsSettings.cs

@@ -6,9 +6,6 @@ namespace NzbDrone.Core.ImportLists.LidarrLists
 {
     public class LidarrListsSettingsValidator : AbstractValidator<LidarrListsSettings>
     {
-        public LidarrListsSettingsValidator()
-        {
-        }
     }
 
     public class LidarrListsSettings : IImportListSettings

src/NzbDrone.Core/ImportLists/MusicBrainzSeries/MusicBrainzSeriesSettings.cs

@@ -6,9 +6,6 @@ namespace NzbDrone.Core.ImportLists.MusicBrainzSeries
 {
     public class MusicBrainzSeriesSettingsValidator : AbstractValidator<MusicBrainzSeriesSettings>
     {
-        public MusicBrainzSeriesSettingsValidator()
-        {
-        }
     }
 
     public class MusicBrainzSeriesSettings : IImportListSettings

src/NzbDrone.Core/MetadataSource/SkyHook/Resource/TrackResource.cs

@@ -4,10 +4,6 @@ namespace NzbDrone.Core.MetadataSource.SkyHook.Resource
 {
     public class TrackResource
     {
-        public TrackResource()
-        {
-        }
-
         public string ArtistId { get; set; }
         public int DurationMs { get; set; }
         public string Id { get; set; }

src/NzbDrone.Core/Notifications/Synology/SynologyIndexerSettings.cs

@@ -1,4 +1,4 @@
-using FluentValidation;
+using FluentValidation;
 using NzbDrone.Core.Annotations;
 using NzbDrone.Core.ThingiProvider;
 using NzbDrone.Core.Validation;
@@ -7,9 +7,6 @@ namespace NzbDrone.Core.Notifications.Synology
 {
     public class SynologyIndexerSettingsValidator : AbstractValidator<SynologyIndexerSettings>
     {
-        public SynologyIndexerSettingsValidator()
-        {
-        }
     }
 
     public class SynologyIndexerSettings : IProviderConfig