protos: Cleanup unused imports (#15329)

Signed-off-by: Ryan Northey <ryan@synca.io>

Mirrored from https://github.com/envoyproxy/envoy @ 7a49df81214b249c9928a2e77e3bd4e540fa6ab1

envoy/extensions/filters/http/kill_request/v3/kill_request.proto

@@ -5,7 +5,6 @@ package envoy.extensions.filters.http.kill_request.v3;
 import "envoy/type/v3/percent.proto";
 
 import "udpa/annotations/status.proto";
-import "udpa/annotations/versioning.proto";
 import "validate/validate.proto";
 
 option java_package = "io.envoyproxy.envoy.extensions.filters.http.kill_request.v3";

envoy/service/status/v3/csds.proto

@@ -8,7 +8,6 @@ import "envoy/type/matcher/v3/node.proto";
 
 import "google/api/annotations.proto";
 
-import "udpa/annotations/migrate.proto";
 import "udpa/annotations/status.proto";
 import "udpa/annotations/versioning.proto";