Drop obsolete Packaging Godot page

The part about the location of user data was outdated and no longer
relevant now that the option to define a custom templates install folder
was removed.

The instructions on the self-contained mode are still relevant, but I'll
rewrite them in a more appropriate location.

development/compiling/index.rst

@@ -16,5 +16,4 @@ Compiling
    compiling_for_uwp
    compiling_for_web
    compiling_with_mono
-   packaging_godot
    optimizing_for_size

development/compiling/packaging_godot.rst

@@ -1,57 +0,0 @@
-.. _doc_packaging_godot:
-
-Packaging Godot
-===============
-
-Godot has features to make it easier to distribute and to package it for application repositories.
-
-Default behaviour
------------------
-
-By default, Godot stores all settings and installed templates in a per-user directory.
-First Godot checks the ``APPDATA`` environment variable. If it exists, the per-user directory
-is the ``Godot`` subdirectory of ``APPDATA``.
-If ``APPDATA`` doesn't exist, Godot checks the ``HOME`` environment variable. The per-user
-directory is then the ".godot" subdir of ``HOME``.
-
-This meets common operating system standards.
-
-Global template path (Unix only)
---------------------------------
-
-The ``unix_global_settings_path`` build variable is meant for Unix/Linux distro packagers
-who want to package export templates together with godot. It allows to put the export
-templates on a hardcoded path.
-
-To use it, pass the desired path via the scons ``unix_global_settings_path`` build variable
-when building the editor. The export templates then live at the "templates" subdirectory
-of the path specified.
-
-Templates installed at the per-user location still override the system wide templates.
-
-This option is only available on unix based platforms.
-
-Self contained mode
--------------------
-
-The self contained mode can be used to package Godot for distribution systems where it
-doesn't live at a fixed location. If the editor finds a ``._sc_`` file in the directory
-the executable is located in, Godot will continue in "self contained mode".
-On Windows, the file name to use is ``_sc_`` (without the preceding dot).
-
-In self contained mode, all config files are located next to the executable in a directory
-called ``editor_data``. Godot doesn't read or write to the per-user location anymore.
-
-The contents of the ``._sc_`` file (when not empty) are read with the ConfigFile api (same
-format as ``project.godot``, etc). So far it can contain a list of pre-loaded project in this
-format:
-
-::
-
-  [init_projects]
-  list=["demos/2d/platformer", "demos/2d/isometric"]
-
-The paths are relative to the executable location, and will be added to the file ``editor_settings.xml``
-when this is created for the first time.
-
-