The way the Uplink Interface is being displayed in Spectrum is correct.
To remove the entity entry there are 2 options available:
- Set MIB permission on the device not to allow Spectrum to query the entity MIB information
- Set EnableEntityModuleModeling attribute (0x12e5f) to No
Using option 2 will remove it from the Navigation Panel - Chassis Manager but the entity information will be still shown in the Component Detail Panel - Information - Entity View.