payload service: remove key parameter

We don't need to receive the key parameter for the images as if we're
getting a signed image the correctly formatted key name will be present
by parsing the target image artifact location.

We're removing this from the recipes side and config as well.

BUG=b:177903628
TEST=./run_tests

Change-Id: Ie74f13761de66a91e1d50e57e25ad3db9e7160a3
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/3291946
Tested-by: George Engelbrecht <engeg@google.com>
Auto-Submit: George Engelbrecht <engeg@google.com>
Commit-Queue: Jack Neus <jackneus@google.com>
Reviewed-by: Jack Neus <jackneus@google.com>
Reviewed-by: Alex Klein <saklein@chromium.org>
diff --git a/api/controller/payload.py b/api/controller/payload.py
index 00d5cf1..d0fa6a3 100644
--- a/api/controller/payload.py
+++ b/api/controller/payload.py
@@ -66,18 +66,11 @@
   # Find the value of bucket or default to 'chromeos-releases'.
   destination_bucket = input_proto.bucket or 'chromeos-releases'
 
-  if input_proto.dryrun:
-    keyset = ''
-    upload = False
-  else:
-    keyset = input_proto.keyset
-    upload = True
-
   # There's a potential that some paygen_lib library might raise here, but since
   # we're still involved in config we'll keep it before the validate_only.
   payload_config = payload.PayloadConfig(tgt_image, src_image,
                                          destination_bucket, input_proto.verify,
-                                         keyset, upload,
+                                         upload=not input_proto.dryrun,
                                          cache_dir=_DEFAULT_PAYGEN_CACHE_DIR)
 
   # If configured for validation only we're done here.
@@ -88,7 +81,7 @@
   local_path, remote_uri = payload_config.GeneratePayload()
   _SetGeneratePayloadOutputProto(output_proto, local_path, remote_uri)
 
-  if remote_uri or not upload and local_path:
+  if remote_uri or input_proto.dryrun and local_path:
     return controller.RETURN_CODE_SUCCESS
   else:
     return controller.RETURN_CODE_COMPLETED_UNSUCCESSFULLY