Remove dirty hack _setupAutoInstallUninstall

This hack was done in order to have the buildout uninstalling the part
and reinstalling every time.

This was because big monolitic recipe were doing some internal
calculations.

This is not needed anymore with generic recipes.

slapos/recipe/librecipe/genericslap.py

@@ -47,15 +47,6 @@ class GenericSlapRecipe(GenericBaseRecipe):
     self.key_file = slap_connection.get('key-file')
     self.cert_file = slap_connection.get('cert-file')
 
-    # setup auto uninstall/install
-    self._setupAutoInstallUninstall()
-
-  def _setupAutoInstallUninstall(self):
-    """By default SlapOS recipes are reinstalled each time"""
-    # Note: It is possible to create in future subclass which will do no-op in
-    # this method
-    self.options['slapos-timestamp'] = str(time.time())
-
   def install(self):
     self.slap.initializeConnection(self.server_url, self.key_file,
         self.cert_file)