Uncap PrettyTable

This is now maintained as a Jazzband project [1].

[1] https://github.com/jazzband/prettytable



Change-Id: Id484bf8fe017bf8f6784155462640840b2053677
Signed-off-by: Stephen Finucane <stephenfin@redhat.com>

requirements.txt

@@ -4,6 +4,6 @@
 
 oslo.config>=5.2.0 # Apache-2.0
 oslo.i18n>=3.15.3 # Apache-2.0
-PrettyTable<0.8,>=0.7.1 # BSD
+PrettyTable>=0.7.1 # BSD
 oslo.utils>=4.5.0 # Apache-2.0
 oslo.policy>=2.0.0 # Apache-2.0