Fix bug in research

You can't have zombie corpse

Author: Yankes

bin/standard/xcom1/research.rul

@@ -216,11 +216,6 @@ research:
       - STR_SNAKEMAN_COMMANDER
       - STR_ETHEREAL_COMMANDER
       - STR_FLOATER_COMMANDER
-  - name: STR_ZOMBIE_CORPSE
-    cost: 180
-    points: 50
-    lookup: STR_ZOMBIE_AUTOPSY
-    needItem: true
   - name: STR_SECTOID_CORPSE
     cost: 180
     points: 50
@@ -854,4 +849,4 @@ research:
     needItem: true
   - name: STR_SUPPLY_SHIP
     points: 50
-    needItem: true
+    needItem: true