Remove unnecessary commas

Signed-off-by: Longyin Huang <longhuan@cisco.com>

Author: longhuan-cisco

inc/saiport.h

@@ -4120,15 +4120,15 @@ typedef enum _sai_port_serdes_attr_t
      * {
      *    "attr_xyz": {
      *        "sai_metadata": {
-     *        "sai_attr_value_type": "SAI_ATTR_VALUE_TYPE_INT32_LIST",
+     *        "sai_attr_value_type": "SAI_ATTR_VALUE_TYPE_INT32_LIST"
      *        },
      *        "value": [10, 10, 10, 10]
      *    }
      * },
      * {
      *    "attr_abc": {
      *        "sai_metadata": {
-     *        "sai_attr_value_type": "SAI_ATTR_VALUE_TYPE_INT32_LIST",
+     *        "sai_attr_value_type": "SAI_ATTR_VALUE_TYPE_INT32_LIST"
      *        },
      *        "value": [20, 20, 20, 20]
      *    }