Fix hasSigV4aAuth function for including the corresponding header

Author: sbaluja

generated/src/aws-cpp-sdk-dynamodb/include/aws/dynamodb/DynamoDBClient.h

@@ -13,7 +13,6 @@
 #include <smithy/client/serializer/JsonOutcomeSerializer.h>
 #include <smithy/identity/auth/built-in/GenericAuthSchemeResolver.h>
 #include <smithy/identity/auth/built-in/SigV4AuthScheme.h>
-#include <smithy/identity/auth/built-in/SigV4aAuthScheme.h>
 
 namespace Aws {
 namespace DynamoDB {

tools/code-generation/generator/src/main/java/com/amazonaws/util/awsclientgenerator/domainmodels/codegeneration/ServiceModel.java

@@ -55,9 +55,6 @@ public boolean hasSigV4Auth() {
     }
 
     public boolean hasSigV4aAuth() {
-        if(metadata.getSignatureVersion().equals("v4") || metadata.getSignatureVersion().equals("s3v4")) {
-            return true;
-        }
         return operations.values().parallelStream().anyMatch(operation -> operation.getSignerName().equals("Aws::Auth::ASYMMETRIC_SIGV4_SIGNER"));
     }