patch_root cleanup: transition everyone to new code.

recipe_modules/bot_update/api.py

Index: recipe_modules/bot_update/api.py
diff --git a/recipe_modules/bot_update/api.py b/recipe_modules/bot_update/api.py
index 1f93e61796eceaa2c0fd0047fa5043ada0da10d2..a494e8b318038cde2fe4db9c3e64bf5a744442c2 100644
--- a/recipe_modules/bot_update/api.py
+++ b/recipe_modules/bot_update/api.py
@@ -85,7 +85,8 @@ class BotUpdateApi(recipe_api.RecipeApi):
     # Construct our bot_update command.  This basically be inclusive of
     # everything required for bot_update to know:
     root = patch_root
-    if root == 'TODO(TANDRII): REMOVE THIS TRANSITION TO patch_projects':
+    if (root == 'TODO(TANDRII): REMOVE THIS TRANSITION TO patch_projects' or
+        root is None):
       # This special condition is here for initial rollout of this code,
       # because it's hard to test this change without rolling into build
       # repository.
@@ -94,13 +95,6 @@ class BotUpdateApi(recipe_api.RecipeApi):
       assert patch_project_roots is None
       root = self.m.gclient.calculate_patch_root(
           self.m.properties.get('patch_project'), cfg)
-      # TODO(tandrii): get rid the condition below after transition.
-
-    if root is None:
-      root = cfg.solutions[0].name
-      additional = self.m.rietveld.calculate_issue_root(patch_project_roots)
-      if additional:
-        root = self.m.path.join(root, additional)
 
     if patch:
       issue = issue or self._issue