[CodeComplete] Remove code for call pattern heuristics

These options weren’t used anymore, so we can remove them.

tools/SourceKit/lib/SwiftLang/CodeCompletionOrganizer.h

@@ -38,7 +38,6 @@ struct Options {
   bool addInnerResults = false;
   bool addInnerOperators = true;
   bool addInitsToTopLevel = false;
-  bool callPatternHeuristics = false;
   bool hideUnderscores = true;
   bool reallyHideAllUnderscores = false;
   bool hideLowPriority = true;