Removed unused import.

Author: JonathanHenson

http-clients/aws-crt-client/src/main/java/software/amazon/awssdk/http/crt/internal/AwsCrtAsyncHttpStreamAdapter.java

@@ -15,8 +15,6 @@
 
 package software.amazon.awssdk.http.crt.internal;
 
-import static software.amazon.awssdk.crt.utils.ByteBufferUtils.deepCopy;
-
 import java.nio.ByteBuffer;
 import java.util.concurrent.CompletableFuture;
 import software.amazon.awssdk.annotations.SdkInternalApi;