Drop 'dependencies' option

It is redundant with the fact that slapos.buildout already rebuilds
if any dependency is modified. slapos.buildout does not yet understand
the new => syntax from upstream buildout but meanwhile a dummy option
can be set to any options of required parts.

slapos/recipe/cmmi/README.rst

@@ -174,16 +174,6 @@ Supported options
    If any item doesn't exist, the recipe shows a warning message. The
    default value is empty.
 
-``dependencies``
-
-   List all the depended parts:
-
-   dependencies = part1 part2 ...
-
-   All the dependent parts will be installed before this part, besides
-   the changes in any dependent parts will trigger to reinstall
-   current part.
-
 ``environment-section``
 
     Name of a section that provides environment variables that will be used to
@@ -912,76 +902,6 @@ replaced with the recipe final prefix.
     package: Executing pre-install
     installing package at /sample_buildout/parts/package -lib
 
-Extra part dependencies
-=======================
-
-The   recipe  will   treat  all   the   parts  list   in  the   option
-``dependencies`` as dependent parts.  zc.buildout will install all the
-dependent  parts before  install this  part. For  example,
-
-    >>> write('buildout.cfg',
-    ... """
-    ... [buildout]
-    ... newest = false
-    ... parts = package
-    ...
-    ... [package]
-    ... recipe = slapos.recipe.cmmi
-    ... dependencies = package-2
-    ... url = file://%s/package-0.0.0.tar.gz
-    ...
-    ... [package-2]
-    ... recipe = slapos.recipe.cmmi
-    ... url = file://%s/package-0.0.0.tar.gz
-    ... """ % (src, src))
-
-Here "package-2" will be installed first, because it's a denpend part
-of "package":
-
-    >>> print(system(buildout))
-    Uninstalling package.
-    Installing package-2.
-    configure --prefix=/sample_buildout/parts/package-2
-    building package
-    installing package
-    Installing package.
-    configure --prefix=/sample_buildout/parts/package
-    building package
-    installing package
-
-Now let's add a new option for "package-2",
-
-    >>> write('buildout.cfg',
-    ... """
-    ... [buildout]
-    ... newest = false
-    ... parts = package
-    ...
-    ... [package]
-    ... recipe = slapos.recipe.cmmi
-    ... dependencies = package-2
-    ... url = file://%s/package-0.0.0.tar.gz
-    ...
-    ... [package-2]
-    ... recipe = slapos.recipe.cmmi
-    ... url = file://%s/package-0.0.0.tar.gz
-    ... configure-command = ./configure
-    ... """ % (src, src))
-
-Look, "package" is reinstalled either:
-
-    >>> print(system(buildout))
-    Uninstalling package.
-    Uninstalling package-2.
-    Installing package-2.
-    configure
-    building package
-    installing package
-    Installing package.
-    configure --prefix=/sample_buildout/parts/package
-    building package
-    installing package
-
 Install shared package
 ======================
 

slapos/recipe/cmmi/__init__.py

@@ -84,25 +84,6 @@ class Recipe(object):
         options['path'] = options.get('path', '').strip()
         options['promises'] = options.get('promises', '')
 
-        # Check dependencies, all the dependent parts will be installed first. It
-        # seems once part is referenced, for example, self.buildout[part], it will
-        # be appended as an install part.
-        # dpendent_parts = options.get('dependencies', '').split()
-        # assert isinstance(buildout, zc.buildout.buildout.Buildout)
-        # buildout._compute_part_signatures(
-        #     [part for part in dpendent_parts if part not in buildout._parts])
-
-        # Calculate md5sum of all the options for each dependent part, and save it
-        # as option "dependencies". So if any dependent part changes, zc.buildout
-        # will reinstall the part because this option is changed.
-        dependencies = []
-        for part in options.get('dependencies', '').split():
-            m = md5()
-            for v in self.buildout[part].values():
-                m.update(v.encode('utf-8'))
-            dependencies.append(m.hexdigest())
-        options['dependencies'] = ' '.join(dependencies)
-
         if options['url'] and options['path']:
             raise zc.buildout.UserError('You must use either "url" or "path", not both!')
         if not (options['url'] or options['path']):