Removing scale curves from animation

Hi, I was reading in doc, that unused scale curves in animations can have bad impact on the performance. So I decided to try removing these curves. I went through many articles and I came with this script (see below) which is called in OnPostprocessModel(GameObject g) in class derived from AssetPostprocessor.

 void Apply(GameObject g)
     {
         List<AnimationClip> animationClipList = new List<AnimationClip>(AnimationUtility.GetAnimationClips(g));
         if (animationClipList.Count == 0) {
             AnimationClip[] objectList = UnityEngine.Object.FindObjectsOfType (typeof(AnimationClip)) as AnimationClip[];
             animationClipList.AddRange(objectList);
         }
 
         int count = 0;
 
         foreach (AnimationClip theAnimation in animationClipList)
         {
             foreach (AnimationClipCurveData theCurve in AnimationUtility.GetAllCurves(theAnimation))
             {
                 string name = theCurve.propertyName.ToLower();
                 if (name.Contains("scale"))
                 {
                     for (int i = theCurve.curve.keys.Length - 1; i >= 0; i--) {
                         theCurve.curve.RemoveKey(i);
                     }
                     string propertyName = theCurve.propertyName;
                     // we can't delete "*.x", e.g. m_LocalScale.x - but only "*", e.g. m_LocalScale
                     if (propertyName.IndexOf(".") > 0) {
                         propertyName = propertyName.Substring(0, propertyName.IndexOf("."));
                     }
                     Debug.Log(string.Format("Fixing: {0} - {1}", theCurve.path, propertyName));
                     theAnimation.SetCurve(theCurve.path, theCurve.type, propertyName, null);
                     count++;
                 }
             } 
         }
 
         int checkCount = 0;
         foreach (AnimationClip theAnimation in animationClipList)
         {
             foreach (AnimationClipCurveData theCurve in AnimationUtility.GetAllCurves(theAnimation))
             {
                 string name = theCurve.propertyName.ToLower();
                 if (name.Contains("scale"))
                 {
                     checkCount++;
                 }
             } 
         }
 
         if (count > 0)
         {
             Debug.Log("Total number of removed curves is " + count + ". GO name: " + g.name);
             Debug.Log("Number of remaining scale curves is " + checkCount);
         }
     }

But I'm not sure if it's actually working. I tried to reimport all animation, but I can't see any changes in any file. Neither in meta files. My check function tells me that there is no more scale curves (variable "checkCount"), but I'm not sure if I can trust it :-). I can't see any impact on the performance in game as well. Does anybody have same experiences? Thank you in advance for your answers!

PS: My animations are imported from fbx files.