Optimize imports.

Author: apottere

src/main/java/graphql/servlet/GraphQLServlet.java

@@ -21,7 +21,6 @@
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.RuntimeJsonMappingException;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;
-import graphql.ExceptionWhileDataFetching;
 import graphql.ExecutionResult;
 import graphql.GraphQL;
 import graphql.GraphQLError;