Remove the Stress framework

It's not used anymore. There was general consensus in Feb 2016
to deprecate it (see [1]) and remove it in Newton.

[1]  [qa] deprecating Tempest stress framework

Change-Id: Ib229985ea2a1fee495c9492c9ce1781e6bac1dc6
diff --git a/etc/logging.conf.sample b/etc/logging.conf.sample
index 36cd324..c131b07 100644
--- a/etc/logging.conf.sample
+++ b/etc/logging.conf.sample
@@ -1,5 +1,5 @@
 [loggers]
-keys=root,tempest_stress
+keys=root
 
 [handlers]
 keys=file,devel,syslog
@@ -11,11 +11,6 @@
 level=DEBUG
 handlers=file
 
-[logger_tempest_stress]
-level=DEBUG
-handlers=file,devel
-qualname=tempest.stress
-
 [handler_file]
 class=FileHandler
 level=DEBUG