Remove unused import

Author: alextwoods

codegen/src/main/java/software/amazon/awssdk/codegen/poet/rules/EndpointResolverInterceptorSpec.java

@@ -75,7 +75,6 @@
 import software.amazon.awssdk.core.metrics.CoreMetric;
 import software.amazon.awssdk.core.signer.Signer;
 import software.amazon.awssdk.endpoints.Endpoint;
-import software.amazon.awssdk.endpoints.EndpointAttributeKey;
 import software.amazon.awssdk.http.SdkHttpRequest;
 import software.amazon.awssdk.http.auth.aws.scheme.AwsV4AuthScheme;
 import software.amazon.awssdk.http.auth.aws.scheme.AwsV4aAuthScheme;