Removing unused function

Author: ahejlsberg

src/compiler/checker.ts

@@ -7843,11 +7843,6 @@ namespace ts {
             return !!(type.flags & TypeFlags.Union ? forEach((<UnionType>type).types, isTupleLikeType) : isTupleLikeType(type));
         }
 
-        // Return true if the given contextual type provides an index signature of the given kind
-        function contextualTypeHasIndexSignature(type: Type, kind: IndexKind): boolean {
-            return !!(type.flags & TypeFlags.Union ? forEach((<UnionType>type).types, t => getIndexInfoOfStructuredType(t, kind)) : getIndexInfoOfStructuredType(type, kind));
-        }
-
         // In an object literal contextually typed by a type T, the contextual type of a property assignment is the type of
         // the matching property in T, if one exists. Otherwise, it is the type of the numeric index signature in T, if one
         // exists. Otherwise, it is the type of the string index signature in T, if one exists.