Note: copy and paste this code in functions.php of your current theme

 function custom_wpcfe_shipment_sections_callback($sections){ 
    /* 
     * To remove section please specify their section key 
     */ 

    // Remove Shipper section 
    unset($sections['shipper_info']); 
    // Remove Receiver section 
    unset($sections['receiver_info']); 
    //Remove Shipment section 
    unset($sections['shipment_info']); 
  } 
  add_filter('wpcfe_shipment_sections', 'custom_wpcfe_shipment_sections_callback');