Returns whether or not a model is useless by checking that the file path is that of a proper model.

If the string ".mdl" is not found in the model name, the function will return true.

The function will also return true if any of the following strings are found in the given model name:

• "_gesture"
• "_anim"
• "_gst"
• "_pst"
• "_shd"
• "_ss"
• "_posture"
• "_anm"
• "ghostanim"
• "_paths"
• "_shared"
• "anim_"
• "gestures_"
• "shared_ragdoll_"