Makefile: remove cleanup of eggs generated on 36lts

The Avocado module named used to be simply "avocado", and thus, those
versions would produce "egg-info"s with that name.  Now with 36lts
EOLed, we can ignore that.
Signed-off-by: NCleber Rosa <crosa@redhat.com>

Makefile

@@ -138,8 +138,6 @@ clean:
 	rm -rf /tmp/avocado*
 	find . -name '*.pyc' -delete
 	find $(AVOCADO_OPTIONAL_PLUGINS) -name '*.egg-info' -exec rm -r {} +
-	# Remove this after 36lts is declared EOL
-	rm -rf avocado.egg-info
 
 pip:
 	$(PYTHON) -m pip --version || $(PYTHON) -c "import os; import sys; import urllib; f = urllib.urlretrieve('https://bootstrap.pypa.io/get-pip.py')[0]; os.system('%s %s' % (sys.executable, f))"