Initialise git with minimal project

Author: HendrikBorgelt

src/catcore/schema/catcore.yaml

@@ -3219,13 +3219,6 @@ slots:
       ucum_code: eV
 
   # Sublimation specific slots
-  synthesis_duration:
-    description: Duration of synthesis
-    range: float
-    slot_uri: voc4cat:0000050
-    multivalued: true
-    unit:
-      ucum_code: h
 
   # Molecular synthesis specific slots  
   reaction_vessel: