[#25] subnet: Drop fields and types

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

netmap/types.proto

@@ -5,8 +5,6 @@ package neo.fs.v2.netmap;
 option go_package = "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/netmap/grpc;netmap";
 option csharp_namespace = "Neo.FileStorage.API.Netmap";
 
-import "refs/types.proto";
-
 // Operations on filters
 enum Operation {
   // No Operation defined
@@ -121,10 +119,6 @@ message PlacementPolicy {
 
   // List of named filters to reference in selectors
   repeated Filter filters = 4 [json_name = "filters"];
-
-  // Subnetwork ID to select nodes from. Zero subnet (default) represents
-  // all of the nodes which didn't explicitly opt out of membership.
-  refs.SubnetID subnet_id = 5 [json_name = "subnetId"];
 }
 
 // NeoFS node description
@@ -164,14 +158,6 @@ message NodeInfo {
   //   attributes it's a string presenting floating point number with comma or
   //   point delimiter for decimal part. In the Network Map it will be saved as
   //   64-bit unsigned integer representing number of minimal token fractions.
-  // * [ __SYSTEM__SUBNET_%s ] \
-  //   (`__NEOFS__SUBNET_%s` is deprecated) \
-  //   `True` or `False`. Defines if the node is included in the `%s` subnetwork
-  //   or not. `%s` must be an existing subnetwork's ID (non-negative integer number).
-  //   A node can be included in more than one subnetwork and, therefore, can contain
-  //   more than one subnet attribute. A missing attribute is equivalent to the
-  //   presence of the attribute with `False` value (except default zero subnetwork
-  //   (with `%s` == 0) for which missing attribute means inclusion in that network).
   // * UN-LOCODE \
   //   Node's geographic location in
   //   [UN/LOCODE](https://www.unece.org/cefact/codesfortrade/codes_index.html)