diff --git a/xds/internal/xdsclient/bootstrap/bootstrap.go b/xds/internal/xdsclient/bootstrap/bootstrap.go
index 1a0971f22272..e27930357cfe 100644
--- a/xds/internal/xdsclient/bootstrap/bootstrap.go
+++ b/xds/internal/xdsclient/bootstrap/bootstrap.go
@@ -565,7 +565,7 @@ func newConfigFromContents(data []byte) (*Config, error) {
 	}
 	node.UserAgentName = gRPCUserAgentName
 	node.UserAgentVersionType = &v3corepb.Node_UserAgentVersion{UserAgentVersion: grpc.Version}
-	node.ClientFeatures = AppendIfNotPresent(node.ClientFeatures, clientFeatureNoOverprovisioning, clientFeatureResourceWrapper)
+	node.ClientFeatures = append(node.ClientFeatures, clientFeatureNoOverprovisioning, clientFeatureResourceWrapper)
 	config.NodeProto = node
 
 	logger.Debugf("Bootstrap config for creating xds-client: %v", pretty.ToJSON(config))
diff --git a/xds/internal/xdsclient/bootstrap/utils.go b/xds/internal/xdsclient/bootstrap/utils.go
deleted file mode 100644
index df185f563dc3..000000000000
--- a/xds/internal/xdsclient/bootstrap/utils.go
+++ /dev/null
@@ -1,36 +0,0 @@
-/*
- *
- * Copyright 2024 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-package bootstrap
-
-// AppendIfNotPresent adds elems to a slice while ignoring duplicates
-func AppendIfNotPresent[E comparable](slice []E, elems ...E) []E {
-	presented := make(map[E]struct{})
-
-	for _, s := range slice {
-		presented[s] = struct{}{}
-	}
-
-	for _, e := range elems {
-		if _, ok := presented[e]; !ok {
-			slice = append(slice, e)
-			presented[e] = struct{}{}
-		}
-	}
-	return slice
-}
diff --git a/xds/internal/xdsclient/bootstrap/utils_test.go b/xds/internal/xdsclient/bootstrap/utils_test.go
deleted file mode 100644
index b28f2b90bd66..000000000000
--- a/xds/internal/xdsclient/bootstrap/utils_test.go
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- *
- * Copyright 2024 gRPC authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
-package bootstrap
-
-import (
-	"reflect"
-	"testing"
-)
-
-func TestAppendIfNotPresent(t *testing.T) {
-	type args struct {
-		slice []string
-		elems []string
-	}
-	tests := []struct {
-		name string
-		args args
-		want []string
-	}{
-		{name: "empty", args: args{[]string{}, []string{"a"}}, want: []string{"a"}},
-		{name: "just append", args: args{[]string{"a"}, []string{"b"}}, want: []string{"a", "b"}},
-		{name: "ignore a", args: args{[]string{"a"}, []string{"a", "b"}}, want: []string{"a", "b"}},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			if got := AppendIfNotPresent(tt.args.slice, tt.args.elems...); !reflect.DeepEqual(got, tt.want) {
-				t.Errorf("appendIfNotPresent() = %v, want %v", got, tt.want)
-			}
-		})
-	}
-}