drop undocumented/deprecated fields of the tourism=trail_riding_station preset

interim/source_strings.yaml

@@ -2684,17 +2684,9 @@ en:
         label: Hoops
         # hoops field placeholder
         placeholder: 1, 2, 4...
-      horse_dressage:
-        # sport=*
-        label: Dressage Riding
-        options:
-          # sport=equestrian
-          equestrian: 'Yes'
-          # sport=undefined
-          undefined: 'No'
       horse_riding:
         # leisure=*
-        label: Horseback Riding
+        label: Horseback Riding Center
         options:
           # leisure=horse_riding
           horse_riding: 'Yes'
@@ -2719,14 +2711,6 @@ en:
         # horse_scale field placeholder
         placeholder: Difficult, Dangerous...
         terms: '[translate with synonyms or related terms for ''Horseback Riding Difficulty'', separated by commas]'
-      horse_stables:
-        # amenity=*
-        label: Riding Stable
-        options:
-          # amenity=stables
-          stables: 'Yes'
-          # amenity=undefined
-          undefined: 'No'
       hot_water:
         # hot_water=*
         label: Hot Water