[Part] SectionCutting: remove unused include

- also uniform line endings 8automatically done by MSVC)

src/Mod/Part/Gui/SectionCutting.cpp

@@ -107,7 +107,7 @@ SectionCut::SectionCut(QWidget* parent)
             ObjectsListVisible.push_back(*it);
     }
 
-    // lambda function to set color and transparency
+    // lambda function to set color and transparency
     auto setColorTransparency = [&](Part::Box* pcBox) {
         App::Color cutColor;
         long cutTransparency;
@@ -531,7 +531,7 @@ void SectionCut::startCutting(bool isInitial)
         // hide the objects since only the cut should later be visible
         (*itCuts)->Visibility.setValue(false);
 
-        // check if all objects have same color and transparency
+        // check if all objects have same color and transparency
         if (ui->AutoCutfaceColor->isChecked()) {
             auto vpObject = dynamic_cast<Gui::ViewProviderGeometryObject*>(
                 Gui::Application::Instance->getViewProvider(*itCuts));

src/Mod/Part/Gui/SectionCutting.h

@@ -24,7 +24,7 @@
 #define PARTGUI_SECTIONCUTTING_H
 
 #include <QDialog>
-#include <App/DocumentObserver.h>
+
 
 namespace PartGui {