[ConstraintSystem] Another small simplification.

Author: rudkx

lib/Sema/ConstraintSystem.cpp

@@ -2022,12 +2022,10 @@ Type ConstraintSystem::simplifyType(Type type) {
   return simplifyTypeImpl(
       *this, type,
       [&](TypeVariableType *tvt) -> Type {
-        tvt = getRepresentative(tvt);
-        if (auto fixed = getFixedType(tvt)) {
+        if (auto fixed = getFixedType(tvt))
           return simplifyType(fixed);
-        }
 
-        return tvt;
+        return getRepresentative(tvt);
       });
 }