ambivalence shouldn't be taken into account

Author: baronfel

src/FsAutoComplete.Core/SignatureFormatter.fs

@@ -43,11 +43,7 @@ module SignatureFormatter =
   let rec formatFSharpType (context: FSharpDisplayContext) (typ: FSharpType) : string =
     let context = context.WithPrefixGenericParameters()
 
-    let nullabilityClause =
-      if typ.HasNullAnnotation || typ.IsNullAmbivalent then
-        " | null"
-      else
-        ""
+    let nullabilityClause = if typ.HasNullAnnotation then " | null" else ""
 
     try
       if typ.IsTupleType || typ.IsStructTupleType then