Remove workaround for function pointers returning a reference in CheckClass::constructors

Variable::isReference() is no longer true for them (#15094).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: autoantwort

lib/checkclass.cpp

@@ -351,14 +351,11 @@ void CheckClassImpl::constructors()
             const bool cpp14OrLater = mSettings.standards.cpp >= Standards::CPP14;
             for (Usage& usage : usageList) {
                 const Variable& var = *usage.var;
-                // isReference() is also true for a function pointer that returns a reference
-                const bool isReferenceMember = var.isReference() && var.nameToken() && Token::Match(var.nameToken()->previous(), "&|&&");
-
                 // check for C++11 initializer
                 if (var.hasDefault()) {
                     usage.init = true;
                     hasAnyDefaultInit = true;
-                } else if (!var.isStatic() && (isReferenceMember || (var.isConst() && !var.isClass()))) {
+                } else if (!var.isStatic() && (var.isReference() || (var.isConst() && !var.isClass()))) {
                     // the default constructor is deleted, so all members are initialized by every instance
                     isDefaultConstructible = false;
                 } else if (cpp14OrLater && !hasAnySelfInit && isInitialized(usage, FunctionType::eConstructor)) {