POV : fix registering

Fix : Removed some duplicate class that caused addon register /
unregister to fail after previous commit

render_povray/render.py

@@ -17,7 +17,9 @@
 # #**** END GPL LICENSE BLOCK #****
 
 # <pep8 compliant>
+
 """Wirte the POV file using this file's functions and some from other modules then render it."""
+
 import bpy
 import subprocess
 import os
@@ -1807,7 +1809,11 @@ class RunPovTextRender(Operator):
         return {'FINISHED'}
 
 
-classes = (PovrayRender, RenderPovTexturePreview, RunPovTextRender)
+classes = (
+    PovrayRender,
+    RenderPovTexturePreview,
+    RunPovTextRender,
+)
 
 
 def register():