Laravel delete() static call

I got this error

Non-static method Illuminate\Database\Eloquent\Model::delete() should not be called statically, assuming $this from incompatible context

here is code in my controller

$file_db = new File();
$file_db = $file_db->where('id',$id)->find($id);
$file_db = $file_db->delete();

Can someone explain what I am doing wrong and how to call it correctly.

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