fix: removes warning (#330)

Author: kneekey23

AWSClientRuntime/Sources/Middlewares/RetrierMiddleware.swift

@@ -22,13 +22,16 @@ public struct RetrierMiddleware<Output: HttpResponseBinding,
                           input: SdkHttpRequestBuilder,
                           next: H) -> Result<OperationOutput<Output>, SdkError<OutputError>>
     where H: Handler,
-          Self.MInput == H.Input,
-          Self.MOutput == H.Output,
-          Self.Context == H.Context,
-          Self.MError == H.MiddlewareError {
+    Self.MInput == H.Input,
+    Self.MOutput == H.Output,
+    Self.Context == H.Context,
+    Self.MError == H.MiddlewareError {
 
+        guard let region = context.getRegion(), !region.isEmpty else {
+            return .failure(.client(ClientError.unknownError(("Region is unable to be resolved"))))
+        }
         do {
-            let partitionId = "\(context.getServiceName()) - \(context.getRegion())"
+            let partitionId = "\(context.getServiceName()) - \(region))"
             let token = try retrier.acquireToken(partitionId: partitionId)
             return try tryRequest(token: token, partitionId: partitionId, context: context, input: input, next: next)
 
@@ -44,10 +47,10 @@ public struct RetrierMiddleware<Output: HttpResponseBinding,
                        input: SdkHttpRequestBuilder,
                        next: H) throws -> Result<OperationOutput<Output>, SdkError<OutputError>>
     where H: Handler,
-          Self.MInput == H.Input,
-          Self.MOutput == H.Output,
-          Self.Context == H.Context,
-          Self.MError == H.MiddlewareError {
+    Self.MInput == H.Input,
+    Self.MOutput == H.Output,
+    Self.Context == H.Context,
+    Self.MError == H.MiddlewareError {
         defer { retrier.releaseToken(token: token)}
 
         let serviceResponse = next.handle(context: context, input: input)

codegen/smithy-aws-swift-codegen/src/main/kotlin/software/amazon/smithy/aws/swift/codegen/AWSHttpProtocolCustomizations.kt

@@ -39,7 +39,6 @@ abstract class AWSHttpProtocolCustomizations : DefaultHttpProtocolCustomizations
         // FIXME handle indentation properly or do swift formatting after the fact
         writer.write("  .withCredentialsProvider(value: config.credentialsProvider)")
         writer.write("  .withRegion(value: config.region)")
-        writer.write("  .withHost(value: \"$endpointPrefix.\\(config.region).amazonaws.com\")")
         if (AWSSigningMiddleware.hasSigV4AuthScheme(ctx.model, ctx.service, op)) {
             val signingName = AWSSigningMiddleware.signingServiceName(serviceShape)
             writer.write("  .withSigningName(value: \$S)", signingName)