Small Cleanups

Remove install_command, the default is just fine.

Update openstackdocstheme version, remove obsolete setting of
html_last_updated_fmt.

Update pbr version.

Change-Id: I759fcb2d65b6cc7132486088e1e3f1388a9a2e6d

doc/requirements.txt

@@ -1,3 +1,3 @@
-pbr>=0.6,!=0.7,<1.0
+pbr!=2.1.0,>=2.0.0 # Apache-2.0
 openstackdocstheme>=1.18.1 # Apache-2.0
 sphinx!=1.6.6,!=1.6.7,>=1.6.2;python_version>='3.4' # BSD

doc/source/conf.py

@@ -131,7 +131,7 @@ html_title = 'Blazar Specs'
 
 # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
 # using the given strftime format.
-html_last_updated_fmt = '%Y-%m-%d %H:%M'
+# html_last_updated_fmt = '%Y-%m-%d %H:%M'
 
 # If true, SmartyPants will be used to convert quotes and dashes to
 # typographically correct entities.

tox.ini

@@ -6,7 +6,6 @@ skipsdist = True
 [testenv]
 basepython = python3
 usedevelop = True
-install_command = pip install -U {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/doc/requirements.txt