Remove old excludes

These are detected as errors since the clean up was done[1] in
the requirements repository.

[1] 314734e938f107cbd5ebcc7af4d9167c11347406

Change-Id: I7dd3fe7cfeecc5e7f1d2d4b2080c49d59503faae

doc/requirements.txt

@@ -1,7 +1,3 @@
-# The order of packages is significant, because pip processes them in the order
-# of appearance. Changing the order has an impact on the overall integration
-# process, which may cause wedges in the gate later.
-
-sphinx>=2.0.0,!=2.1.0 # BSD
+sphinx>=2.0.0 # BSD
 sphinxcontrib-svg2pdfconverter>=0.1.0 # BSD
 openstackdocstheme>=2.2.1 # Apache-2.0

requirements.txt

@@ -1,10 +1,10 @@
 # Requirements lower bounds listed here are our best effort to keep them up to
 # date but we do not test them so no guarantee of having them all correct. If
 # you find any incorrect lower bounds, let us know or propose a fix.
-pbr!=2.1.0,>=2.0.0 # Apache-2.0
+pbr>=2.0.0 # Apache-2.0
 requests>=2.14.2 # Apache-2.0
-cliff!=2.9.0,>=2.8.0 # Apache-2.0
+cliff>=2.8.0 # Apache-2.0
 keystoneauth1>=5.1.1 # Apache-2.0
 oslo.i18n>=3.15.3 # Apache-2.0
-oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
+oslo.serialization>=2.18.0 # Apache-2.0
 oslo.utils>=3.33.0 # Apache-2.0

test-requirements.txt

@@ -1,6 +1,6 @@
 hacking>=6.1.0,<6.2.0 # Apache-2.0
 
-coverage!=4.4,>=4.1 # Apache-2.0
+coverage>=4.1 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 requests-mock>=1.2.0 # Apache-2.0
 stestr>=2.0.0 # Apache-2.0