Web: Remove GUI

Web no longer provides a user-visible browser, but only a simple server for remote interaction with FreeCAD. Dependency on QtWebWengine has been removed.

.github/workflows/sub_lint.yml

@@ -466,14 +466,9 @@ jobs:
                             python3-pyside2.qtgui                       \
                             python3-pyside2.qtnetwork                   \
                             python3-pyside2.qtsvg                       \
-                            python3-pyside2.qtwebengine                 \
-                            python3-pyside2.qtwebenginecore             \
-                            python3-pyside2.qtwebenginewidgets          \
-                            python3-pyside2.qtwebchannel                \
                             python3-pyside2.qtwidgets                   \
                             qtbase5-dev                                 \
                             qttools5-dev                                \
-                            qtwebengine5-dev                            \
                             shiboken2                                   \
                             swig                                        \
                             ccache                                      \