got rid of unnecessary demo scene

@@ -45,11 +45,9 @@
 *.tga filter=lfs diff=lfs merge=lfs -text
 *.tif filter=lfs diff=lfs merge=lfs -text
 *.tiff filter=lfs diff=lfs merge=lfs -text
-
-
 # Collapse Unity-generated files on GitHub
 *.asset linguist-generated
 *.mat linguist-generated
 *.meta linguist-generated
 *.prefab linguist-generated
-*.unity linguist-generated
\ No newline at end of file
+*.unity linguist-generated

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