Remove concept of Public from FilterApi

Author: Jeannette

eth/filters/api.go

@@ -230,7 +230,7 @@ func (api *FilterAPI) NewHeads(ctx context.Context) (*rpc.Subscription, error) {
 	return rpcSub, nil
 }
 
-func (api *PublicFilterAPI) NewStateChanges(ctx context.Context, crit FilterCriteria) (*rpc.Subscription, error) {
+func (api *FilterAPI) NewStateChanges(ctx context.Context, crit FilterCriteria) (*rpc.Subscription, error) {
 	notifier, supported := rpc.NotifierFromContext(ctx)
 	if !supported {
 		return &rpc.Subscription{}, rpc.ErrNotificationsUnsupported

eth/filters/filter_system_test.go

@@ -749,7 +749,7 @@ func TestStateChangeSubscription(t *testing.T) {
 	var (
 		db             = rawdb.NewMemoryDatabase()
 		backend        = &testBackend{db: db}
-		api            = NewPublicFilterAPI(backend, false, deadline)
+		api            = NewFilterAPI(backend, false, deadline)
 		genesis        = (&core.Genesis{BaseFee: big.NewInt(params.InitialBaseFee)}).MustCommit(db)
 		numberOfBlocks = 3
 		chain, _       = core.GenerateChain(params.TestChainConfig, genesis, ethash.NewFaker(), db, numberOfBlocks, func(i int, gen *core.BlockGen) {})