removing the constant prefixes from the file names

Author: aman-coder03

docs/sphinx/source/contributing/style_guide.rst

@@ -367,4 +367,3 @@ or to a custom callable for fine-grained control.
 See the Sphinx-Gallery documentation for details:
 `Gallery examples
 <https://sphinx-gallery.github.io/stable/configuration.html#sorting-gallery-examples>`_.
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