[Sema] Remove ConjunctionElement::mightContainCodeCompletionToken

Isn’t used anymore (I think it stopped being used after the new result builder transform was enabled).

Author: ahoppen

include/swift/Sema/ConstraintSystem.h

@@ -6057,10 +6057,6 @@ class ConjunctionElement {
     Element->print(Out, SM, indent);
   }
 
-  /// Returns \c false if this conjunction element is known not to contain the
-  /// code compleiton token.
-  bool mightContainCodeCompletionToken(const ConstraintSystem &cs) const;
-
 private:
   /// Find type variables referenced by this conjunction element.
   /// If this is a closure body element, it would look inside \c ASTNode.

lib/Sema/CSSyntacticElement.cpp

@@ -2651,21 +2651,6 @@ bool ConstraintSystem::applySolutionToBody(Solution &solution, TapExpr *tapExpr,
   return false;
 }
 
-bool ConjunctionElement::mightContainCodeCompletionToken(
-  const ConstraintSystem &cs) const {
-  if (Element->getKind() == ConstraintKind::SyntacticElement) {
-    if (Element->getSyntacticElement().getSourceRange().isInvalid()) {
-      return true;
-    } else {
-      return cs.containsIDEInspectionTarget(Element->getSyntacticElement());
-    }
-  } else {
-    // All other constraint kinds are not handled yet. Assume that they might
-    // contain the code completion token.
-    return true;
-  }
-}
-
 bool ConstraintSystem::applySolutionToSingleValueStmt(
     Solution &solution, SingleValueStmtExpr *SVE, DeclContext *DC,
     RewriteTargetFn rewriteTarget) {