Remove nullary-override compiler option

Author: Philippus

_data/compiler-options.yml

@@ -379,8 +379,6 @@
         description: "Warn when nullary methods return Unit."
       - choice: "inaccessible"
         description: "Warn about inaccessible types in method signatures."
-      - choice: "nullary-override"
-        description: "Warn when non-nullary `def f()` overrides nullary `def f`."
       - choice: "infer-any"
         description: "Warn when a type argument is inferred to be `Any`."
       - choice: "missing-interpolator"
@@ -1135,8 +1133,6 @@
         description: "Warn when nullary methods return Unit."
       - choice: "inaccessible"
         description: "Warn about inaccessible types in method signatures."
-      - choice: "nullary-override"
-        description: "Warn when non-nullary `def f()` overrides nullary `def f`."
       - choice: "infer-any"
         description: "Warn when a type argument is inferred to be `Any`."
       - choice: "missing-interpolator"