fix: update GKE Hub event type to match API (#536)

PiperOrigin-RevId: 540361708

Co-authored-by: Copybara Bot <yoshi-code-bot@google.com>

proto/google/events/cloud/gkehub/v1/data.proto

@@ -32,26 +32,6 @@ message Feature {
   // Output only. State of the Feature resource itself.
   FeatureResourceState resource_state = 3;
 
-  // Optional. Membership-specific configuration for this Feature. If this
-  // Feature does not support any per-Membership configuration, this field may
-  // be unused.
-  //
-  // The keys indicate which Membership the configuration is for, in the form:
-  //
-  // `projects/{p}/locations/{l}/memberships/{m}`
-  //
-  // Where {p} is the project, {l} is a valid location and {m} is a valid
-  // Membership in this project at that location. {p} WILL match the Feature's
-  // project.
-  //
-  // {p} will always be returned as the project number, but the project ID is
-  // also accepted during input. If the same Membership is specified in the map
-  // twice (using the project ID form, and the project number form), exactly
-  // ONE of the entries will be saved, with no guarantees as to which. For this
-  // reason, it is recommended the same format be used for all entries when
-  // mutating a Feature.
-  map<string, MembershipFeatureSpec> membership_specs = 5;
-
   // Output only. The Hub-wide Feature state.
   CommonFeatureState state = 6;
 
@@ -167,13 +147,6 @@ message ScopeFeatureState {
   FeatureState state = 1;
 }
 
-// MembershipFeatureSpec contains configuration information for a single
-// Membership.
-message MembershipFeatureSpec {
-  // True if value of `feature_spec` was inherited from a fleet-level default.
-  bool fleet_inherited = 1;
-}
-
 // MembershipFeatureState contains Feature status information for a single
 // Membership.
 message MembershipFeatureState {