Delete builds.rst

This chapter is no longer needed (duplicate content).
The content is alrady in http://gluon.readthedocs.org/en/latest/user/getting_started.html#getting-started .

docs/user/builds.rst

-Builds
-======
-
-For the build reserve 6GB of disk space. The building requires packages
-for ``subversion``, ncurses headers (``libncurses-dev``) and zlib headers
-(``libz-dev``).
-
-Building Gluon
---------------
-
-To build Gluon, after checking out the repository change to the source root directory to perform the following commands:
-
-::
-
-    git clone git://github.com/freifunk-gluon/site-ffhl.git site # Get the Freifunk Lübeck site repository - or use your own!
-    make update                                                  # Get other repositories used by Gluon
-    make                                                         # Build Gluon
-
-When calling ``make``, the OpenWRT build environment is prepared and updated. To rebuild
-the images only, just use:
-
-::
-
-    make images
-
-The built images can be found in the directory ``images``.
-
-Cleaning up
------------
-
-There are three levels of ``make clean``:
-
-::
-
-    make clean
-
-will only clean the Gluon-specific files;
-
-::
-
-    make cleanall
-
-will also call ``make clean`` on the OpenWRT tree, and
-
-::
-
-    make dirclean
-
-will do all this, and call ``make dirclean`` on the OpenWRT tree.
-
-Environment variables
----------------------
-
-Gluon's build process can be controlled by various environment variables.
-
-GLUON_SITEDIR
-  Path to the site configuration. Defaults to ``site/``.
-
-GLUON_IMAGEDIR
-  Path where images will be stored. Defaults to ``images/``.
-
-GLUON_BUILDDIR
-  Working directory during build. Defaults to ``build/``.