code: @Override
      public DeleteGroupPolicyResult deleteGroupPolicy(DeleteGroupPolicyRequest request) {
          request = beforeClientExecution(request);
          return executeDeleteGroupPolicy(request);
      }
docs: <p>
  Deletes the specified inline policy that is embedded in the specified IAM group.
  </p>
  <p>
  A group can also have managed policies attached to it. To detach a managed policy from a group, use
  <a>DetachGroupPolicy</a>. For more information about policies, refer to <a
  href="https://docs.aws.amazon.com/IAM/latest/UserGuide/policies-managed-vs-inline.html">Managed Policies and
  Inline Policies</a> in the <i>IAM User Guide</i>.
  </p>
  
  @param deleteGroupPolicyRequest
  @return Result of the DeleteGroupPolicy operation returned by the service.
  @throws NoSuchEntityException
  The request was rejected because it referenced a resource entity that does not exist. The error message
  describes the resource.
  @throws LimitExceededException
  The request was rejected because it attempted to create resources beyond the current AWS account limits.
  The error message describes the limit exceeded.
  @throws ServiceFailureException
  The request processing has failed because of an unknown error, exception or failure.
  @sample AmazonIdentityManagement.DeleteGroupPolicy
  @see <a href="http://docs.aws.amazon.com/goto/WebAPI/iam-2010-05-08/DeleteGroupPolicy" target="_top">AWS API
  Documentation</a>