Make coerceParameterListToType a utility

Author: CodaFi

lib/Sema/CSApply.cpp

@@ -7211,7 +7211,7 @@ namespace {
         // Coerce the pattern, in case we resolved something.
         auto fnType = cs.getType(closure)->castTo<FunctionType>();
         auto *params = closure->getParameters();
-        cs.getTypeChecker().coerceParameterListToType(params, closure, fnType);
+        TypeChecker::coerceParameterListToType(params, closure, fnType);
 
         // If this closure had a function builder applied, rewrite it to a
         // closure with a single expression body containing the builder

lib/Sema/TypeChecker.h

@@ -1334,7 +1334,8 @@ class TypeChecker final {
 
   /// Coerce the specified parameter list of a ClosureExpr to the specified
   /// contextual type.
-  void coerceParameterListToType(ParameterList *P, ClosureExpr *CE, AnyFunctionType *FN);
+  static void coerceParameterListToType(ParameterList *P, ClosureExpr *CE,
+                                        AnyFunctionType *FN);
 
   /// Type-check an initialized variable pattern declaration.
   bool typeCheckBinding(Pattern *&P, Expr *&Init, DeclContext *DC);