fixes observe menu bug (#6391)

# About the pull request

Fixes observe menu bug, PMC engineer was being listed as Human category
and not Survivor round 22539. Looking at the code it seems like the same
thing should happen for PMC medic too, so made the same changes there.

# Explain why it's good for the game

My immersion.


# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog
:cl:
fix: more survivors now listed in survivor category on observe menu
/:cl:

code/modules/gear_presets/survivors/solaris/crashlanding-offices_insert_bigred.dm

@@ -45,7 +45,6 @@
 /datum/equipment_preset/survivor/pmc/medic
 	name = "Survivor - PMC Medic"
 	assignment = JOB_PMC_MEDIC
-	rank = JOB_PMC_MEDIC
 	paygrade = PAY_SHORT_PMC_MS
 	skills = /datum/skills/civilian/survivor/pmc/medic
 
@@ -65,7 +64,6 @@
 /datum/equipment_preset/survivor/pmc/engineer
 	name = "Survivor - PMC Engineer"
 	assignment = JOB_PMC_ENGINEER
-	rank = JOB_PMC_ENGINEER
 	paygrade = PAY_SHORT_PMC_TEC
 	skills = /datum/skills/civilian/survivor/pmc/engineer