[cli-reference] remove sahara CLI support

With python-saharaclient 1.0.0 release,
old CLI commands are removed.
Please use OpenStackClient instead.

Change-Id: I838b7eff7091dd3922229392fed69b49df6fd99e

os_doc_tools/commands.py

@@ -368,7 +368,7 @@ def generate_command(os_command, os_file):
                 next_line_screen = True
                 ignore_next_lines = True
                 continue
-            # magnum and sahara
+            # magnum
             if line.startswith('Common auth options'):
                 if in_screen:
                     os_file.write("\n\n")

os_doc_tools/resources/clients.yaml

@@ -105,8 +105,6 @@ neutron:
     name: Networking service
 nova:
     name: Compute service
-sahara:
-    name: Data Processing service
 senlin:
     name: Clustering service
 solum: