Revert "Support using IAM Credentials on AWS S3 V2."

This reverts commit d2877cd.

Author: Gonzalo Gallotti Vazquez

gxcloudstorage-awss3-v2/src/main/java/com/genexus/db/driver/ExternalProviderS3V2.java

@@ -182,23 +182,10 @@ private S3Client buildS3Client(String accessKey, String secretKey, String endpoi
 	}
 
 	private S3Presigner buildS3Presinger(String accessKey, String secretKey, String region) {
-		boolean bUseIAM = !getPropertyValue(USE_IAM, "", "").isEmpty()
-			|| (accessKey.isEmpty() && secretKey.isEmpty());
-
-		S3Presigner.Builder presignerBuilder = S3Presigner.builder()
-			.region(Region.of(region));
-
-		if (bUseIAM) {
-			logger.debug("Using IAM Credentials for S3Presigner");
-		} else {
-			presignerBuilder.credentialsProvider(
-				StaticCredentialsProvider.create(
-					AwsBasicCredentials.create(accessKey, secretKey)
-				)
-			);
-		}
-
-		return presignerBuilder.build();
+		return S3Presigner.builder()
+			.region(Region.of(region))
+			.credentialsProvider(StaticCredentialsProvider.create(AwsBasicCredentials.create(accessKey, secretKey)))
+			.build();
 	}
 
 	private void bucketExists() {