Drop max_frequency in ProtocolConfig.

src/main/proto/wfa/measurement/api/v2alpha/protocol_config.proto

@@ -206,11 +206,9 @@ message ProtocolConfig {
     // Parameters for secret sharing sketches.
     SecretSharingSketchParams sketch_params = 1
         [(google.api.field_behavior) = REQUIRED];
-    // The maximum frequency to reveal in the histogram. This is also the EDP
-    // frequency cap.
-    int32 maximum_frequency = 2;
+
     // The mechanism to generate noise by workers during the computation.
-    NoiseMechanism noise_mechanism = 3;
+    NoiseMechanism noise_mechanism = 2;
   }
 
   // Configuration for a specific protocol.
@@ -286,6 +284,7 @@ message ReachOnlyLiquidLegionsSketchParams {
 message SecretSharingSketchParams {
   // The size of the sketch.
   int64 sketch_size = 1;
+
   // Length of each item in bits. #_EDPs * max_frequency should be no more than
   // 2^bit_per_item.
   int32 bit_per_item = 2;