Update version requirements

Remove poezio as a dependency as this module will be called from poezio
anyway, making this dep a waste of resources.

Signed-off-by: Maxime “pep” Buquet <pep@bouah.net>

requirements.txt

@@ -1,2 +1 @@
-poezio
-slixmpp-omemo
+slixmpp-omemo>=0.6.1

setup.py

@@ -61,6 +61,6 @@ setup(
     platforms=['any'],
     packages=['poezio_omemo'],
     entry_points={'poezio_plugins': 'omemo = poezio_omemo'},
-    install_requires=['poezio', 'slixmpp-omemo'],
+    install_requires=['slixmpp-omemo>=0.6.1'],
     classifiers=CLASSIFIERS,
 )