[Android] Don't use a device blacklist if one isn't provided.

build/android/adb_install_apk.py

Index: build/android/adb_install_apk.py
diff --git a/build/android/adb_install_apk.py b/build/android/adb_install_apk.py
index e00981fb8b8420068da2c477f673d4651fb4df62..4f299efaac40da84eb158a0c3eaf41b8b24073ea 100755
--- a/build/android/adb_install_apk.py
+++ b/build/android/adb_install_apk.py
@@ -83,12 +83,9 @@ def main():
             and helper.GetSplitName()):
           splits.append(f)
 
-  if args.blacklist_file:
-    blacklist = device_blacklist.Blacklist(args.blacklist_file)
-  else:
-    # TODO(jbudorick): Remove this once the bots are converted.
-    blacklist = device_blacklist.Blacklist(device_blacklist.BLACKLIST_JSON)
-
+  blacklist = (device_blacklist.Blacklist(args.blacklist_file)
+               if args.blacklist_file
+               else None)
   devices = device_utils.DeviceUtils.HealthyDevices(blacklist)
 
   if args.device: