Remove wrong requires of egenix-mx-base

(transplanted from 5493cc5d34e40575b2a22f47448604d44c1b5ccc)

setup.py

@@ -10,7 +10,7 @@ major_version, minor_version, _ = info.get('version', '0.0.1').split('.', 2)
 major_version = int(major_version)
 minor_version = int(minor_version)
 
-requires = ['egenix-mx-base']
+requires = []
 for dep in info.get('depends', []):
     if not re.match(r'(ir|res|workflow|webdav)(\W|$)', dep):
         requires.append('trytond_%s >= %s.%s, < %s.%s' %