proto: fix witness request definition

proto/penumbra/penumbra/view/v1alpha1/view.proto

@@ -90,12 +90,12 @@ service ViewProtocolService {
   // Translates a high-level intent ("send X funds to Y address") into a complete transaction plan.
   rpc TransactionPlanner(TransactionPlannerRequest) returns (TransactionPlannerResponse);
 
-  // Returns authentication paths for the given note commitments.
+  // Returns authentication data for the given transaction plan.
   //
-  // This method takes a batch of input commitments, rather than just one, so
-  // that the client can get a consistent set of authentication paths to a
-  // common root.  (Otherwise, if a client made multiple requests, the wallet
-  // service could have advanced the state commitment tree state between queries).
+  // This method takes a complete transaction plan, so that the client can get a
+  // consistent set of authentication paths to a common root for the entire
+  // transaction.  (Otherwise, if a client made multiple requests, the wallet
+  // service could have advanced the state commitment tree  between queries).
   rpc Witness(WitnessRequest) returns (WitnessResponse);
 
   // Like `Witness`, but immediately uses the witness data to build (prove) the transaction.
@@ -357,9 +357,6 @@ message NotesForVotingRequest {
 }
 
 message WitnessRequest {
-  // The note commitments to obtain auth paths for.
-  repeated crypto.tct.v1alpha1.StateCommitment note_commitments = 2;
-
   // The transaction plan to witness
   core.transaction.v1alpha1.TransactionPlan transaction_plan = 3;
 }