Remove Pods-Unity-iPhone

I need remove libPods-Unity-iPhone.a into link binary
I use RemoveFileFromBuild, RemoveFrameworkFromProject, but it’s non remove
How can I remove it or how do I prevent it from appearing in pbxproj?
Unity5.6.2f1

No one knows?
An example of how it does not work:

string projPath = pathToBuiltProject + "/Unity-iPhone.xcodeproj/project.pbxproj";

PBXProject proj = new PBXProject();
proj.ReadFromString(File.ReadAllText(projPath));

string target = proj.TargetGuidByName("Unity-iPhone");

proj.SetBuildProperty(target, "ENABLE_BITCODE", "NO");
proj.SetBuildProperty(target, "CLANG_ENABLE_MODULES", "YES");
proj.RemoveFrameworkFromProject (target, "libPods-Unity-iPhone.a");

File.WriteAllText(projPath, proj.WriteToString());

SetBuildProperty is worked