Simplify version format

This package is too small to have a proper release cycle. Therefore
every commit to master will be released according to samantic versioning.

health_check/__init__.py

@@ -1,13 +1,7 @@
 # -*- coding: utf-8 -*-
 # Used by setup.py, so minimize top-level imports.
 
-__version_info__ = {
-    'major': 1,
-    'minor': 3,
-    'micro': 0,
-    'releaselevel': 'final',
-    'serial': 0
-}
+VERSION = (1, 3, 0)
 
 default_app_config = 'health_check.apps.HealthCheckConfig'
 
@@ -24,14 +18,4 @@ def autodiscover():
     autodiscover_modules('plugin_health_check', register_to=plugin_dir)
 
 
-def get_version(short=False):
-    assert __version_info__['releaselevel'] in ('alpha', 'beta', 'final')
-    vers = ["%(major)i.%(minor)i" % __version_info__, ]
-    if __version_info__['micro']:
-        vers.append(".%(micro)i" % __version_info__)
-    if __version_info__['releaselevel'] != 'final' and not short:
-        vers.append('%s%i' % (__version_info__['releaselevel'][0], __version_info__['serial']))
-    return ''.join(vers)
-
-
-__version__ = get_version()
+__version__ = ".".join(str(i) for i in VERSION)