Remove unnecessary fetching of gateway (#20172)

The fetched gateway isn't currently used anywhere

internal/mesh/internal/controllers/gatewayproxy/controller.go

@@ -80,27 +80,6 @@ func (r *reconciler) Reconcile(ctx context.Context, rt controller.Runtime, req c
 		return nil
 	}
 
-	// TODO NET-7014 Determine what gateway controls this workload
-	// For now, we cheat by knowing the MeshGateway's name, type + tenancy ahead of time
-	gatewayID := &pbresource.ID{
-		Name:    "mesh-gateway",
-		Type:    pbmesh.MeshGatewayType,
-		Tenancy: resource.DefaultPartitionedTenancy(),
-	}
-
-	// Check if the gateway exists.
-	gateway, err := dataFetcher.FetchMeshGateway(ctx, gatewayID)
-	if err != nil {
-		rt.Logger.Error("error reading the associated gateway", "error", err)
-		return err
-	}
-	if gateway == nil {
-		// If gateway has been deleted, then return as ProxyStateTemplate should be
-		// cleaned up by the garbage collector because of the owner reference.
-		rt.Logger.Trace("gateway doesn't exist; skipping reconciliation", "gateway", gatewayID)
-		return nil
-	}
-
 	proxyStateTemplate, err := dataFetcher.FetchProxyStateTemplate(ctx, req.ID)
 	if err != nil {
 		rt.Logger.Error("error reading proxy state template", "error", err)