fix #2599 as per elastic/elasticsearch#22853

Author: Mpdreamz

src/Nest/Modules/SnapshotAndRestore/Repositories/S3Repository.cs

@@ -21,9 +21,6 @@ public interface IS3RepositorySettings : IRepositorySettings
 		[JsonProperty("bucket")]
 		string Bucket { get; set; }
 
-		[JsonProperty("region")]
-		string Region { get; set; }
-
 		[JsonProperty("base_path")]
 		string BasePath { get; set; }
 
@@ -53,7 +50,6 @@ public S3RepositorySettings(string bucket)
 		}
 
 		public string Bucket { get; set; }
-		public string Region { get; set; }
 		public string BasePath { get; set; }
 		public string AccessKey { get; set; }
 		public string SecretKey { get; set; }
@@ -62,11 +58,10 @@ public S3RepositorySettings(string bucket)
 		public string ChunkSize { get; set; }
 	}
 
-	public class S3RepositorySettingsDescriptor 
+	public class S3RepositorySettingsDescriptor
 		: DescriptorBase<S3RepositorySettingsDescriptor, IS3RepositorySettings>, IS3RepositorySettings
 	{
 		string IS3RepositorySettings.Bucket { get; set; }
-		string IS3RepositorySettings.Region { get; set; }
 		string IS3RepositorySettings.BasePath { get; set; }
 		string IS3RepositorySettings.AccessKey { get; set; }
 		string IS3RepositorySettings.SecretKey { get; set; }
@@ -80,13 +75,6 @@ public class S3RepositorySettingsDescriptor
 		/// <param name="bucket"></param>
 		public S3RepositorySettingsDescriptor Bucket(string bucket) => Assign(a => a.Bucket = bucket);
 
-		/// <summary>
-		/// The region where bucket is located. Defaults to US Standard
-		/// </summary>
-		/// <param name="region"></param>
-		/// <returns></returns>
-		public S3RepositorySettingsDescriptor Region(string region) => Assign(a => a.Region = region);
-
 		/// <summary>
 		/// Specifies the path within bucket to repository data. Defaults to root directory.
 		/// </summary>
@@ -109,7 +97,7 @@ public class S3RepositorySettingsDescriptor
 		public S3RepositorySettingsDescriptor SecretKey(string secretKey) => Assign(a => a.SecretKey = secretKey);
 
 		/// <summary>
-		/// When set to true metadata files are stored in compressed format. This setting doesn't 
+		/// When set to true metadata files are stored in compressed format. This setting doesn't
 		/// affect index files that are already compressed by default. Defaults to false.
 		/// </summary>
 		/// <param name="compress"></param>
@@ -122,15 +110,15 @@ public class S3RepositorySettingsDescriptor
 		public S3RepositorySettingsDescriptor ConcurrentStreams(int concurrentStreams) => Assign(a => a.ConcurrentStreams = concurrentStreams);
 
 		/// <summary>
-		///  Big files can be broken down into chunks during snapshotting if needed. 
-		/// The chunk size can be specified in bytes or by using size value notation, 
+		///  Big files can be broken down into chunks during snapshotting if needed.
+		/// The chunk size can be specified in bytes or by using size value notation,
 		/// i.e. 1g, 10m, 5k. Defaults to 100m.
 		/// </summary>
 		/// <param name="chunkSize"></param>
 		public S3RepositorySettingsDescriptor ChunkSize(string chunkSize) => Assign(a => a.ChunkSize = chunkSize);
 	}
 
-	public class S3RepositoryDescriptor 
+	public class S3RepositoryDescriptor
 		: DescriptorBase<S3RepositoryDescriptor, IS3Repository>, IS3Repository
 	{
 		string ISnapshotRepository.Type { get; } = "s3";

src/Tests/Modules/SnapshotAndRestore/Repositories/CreateRepository/CreateRepositoryApiTests.cs

@@ -251,7 +251,6 @@ protected override LazyResponses ClientUsage() => Calls(
 			type = "s3",
 			settings = new {
 				bucket = "foobucket",
-				region = "us-east",
 				base_path = "some/path",
 				access_key = "fooaccess",
 				secret_key = "foosecret",
@@ -266,7 +265,6 @@ protected override LazyResponses ClientUsage() => Calls(
 		protected override Func<CreateRepositoryDescriptor, ICreateRepositoryRequest> Fluent => d => d
 			.S3(fs => fs
 				.Settings("foobucket", s => s
-					.Region("us-east")
 					.BasePath("some/path")
 					.AccessKey("fooaccess")
 					.SecretKey("foosecret")
@@ -280,7 +278,6 @@ protected override LazyResponses ClientUsage() => Calls(
 		{
 			Repository = new S3Repository(new S3RepositorySettings("foobucket")
 			{
-				Region = "us-east",
 				BasePath = "some/path",
 				AccessKey = "fooaccess",
 				SecretKey = "foosecret",