Little clean-up of ConstVectorOfPtrsAdaptor to be more vector like.

src/libslic3r/GCode/ToolOrdering.cpp

@@ -658,7 +658,7 @@ float WipingExtrusions::mark_wiping_extrusions(const Print& print, unsigned int
         return std::max(0.f, volume_to_wipe); // Soluble filament cannot be wiped in a random infill, neither the filament after it
 
     // we will sort objects so that dedicated for wiping are at the beginning:
-    ConstPrintObjectPtrs object_list = print.objects().vector();
+    ConstPrintObjectPtrs object_list(print.objects().begin(), print.objects().end());
     std::sort(object_list.begin(), object_list.end(), [](const PrintObject* a, const PrintObject* b) { return a->config().wipe_into_objects; });
 
     // We will now iterate through

src/libslic3r/Print.hpp

@@ -129,7 +129,6 @@ public:
     bool                    empty() const { return m_data->empty(); }
     const T*                operator[](size_t i) const { return (*m_data)[i]; }
     const T*                at(size_t i) const { return m_data->at(i); }
-    std::vector<const T*>   vector() const { return std::vector<const T*>(this->begin(), this->end()); }
 protected:
     ConstVectorOfPtrsAdaptor(const std::vector<T*> *data) : m_data(data) {}
 private: