Remove reference to unused translitcodec.

guix-env.scm

@@ -373,7 +373,6 @@ data as NumPy arrays.")
        ("python-soundfile" ,python-soundfile)
        ("python-sphinx" ,python-sphinx)
        ("python-sqlalchemy" ,python-sqlalchemy)
-       ("python-translitcodec" ,python-translitcodec)
        ("python-unidecode" ,python-unidecode)
        ("python-waitress" ,python-waitress)
        ("python-werkzeug" ,python-werkzeug)

setup.cfg

@@ -68,8 +68,6 @@ install_requires =
     werkzeug>=0.7,<2.0.0  # 2.0.0 breaks legacy API and submission tests.
     wtforms>2.1,<3.0  # Removed the "ext" module in 3.0.
 
-    # This is optional:
-    # 'translitcodec',
     # For now we're expecting that users will install this from
     # their package managers.
     # 'lxml',