Remove bogus master/builder/slave/force parameters from bot_update.

recipe_modules/bot_update/test_api.py

Index: recipe_modules/bot_update/test_api.py
diff --git a/recipe_modules/bot_update/test_api.py b/recipe_modules/bot_update/test_api.py
index eeeb49ba660d2ece56d37158dce736e2470f3679..7294052b1c4d7d50b5e32270471de98ea703c912 100644
--- a/recipe_modules/bot_update/test_api.py
+++ b/recipe_modules/bot_update/test_api.py
@@ -3,15 +3,12 @@
 # found in the LICENSE file.
 
 import hashlib
-import os
 import struct
-import sys
 from recipe_engine import recipe_test_api
 
 
 class BotUpdateTestApi(recipe_test_api.RecipeTestApi):
-  def output_json(self, master, builder, slave, root, first_sln,
-                  revision_mapping, fail_patch=False,
+  def output_json(self, root, first_sln, revision_mapping, fail_patch=False,
                   output_manifest=False, fixed_revisions=None):
     """Deterministically synthesize json.output test data for gclient's
     --output-json option.