Take tempurl out of Swift pipeline additions

Swift commit 165dd44 added tempurl to the sample config, so now it
appears twice in the default devstack-installed configuration. This
commit removes tempurl from $SWIFT_EXTRAS_MIDDLEWARE so that it only
appears once in the generated proxy pipeline.

Change-Id: I4204b2a444312ab87c17f5fb296a43818a4528a6
diff --git a/lib/swift b/lib/swift
index b8bc1b6..b655440 100644
--- a/lib/swift
+++ b/lib/swift
@@ -67,8 +67,8 @@
 SWIFT_LOOPBACK_DISK_SIZE=${SWIFT_LOOPBACK_DISK_SIZE:-$SWIFT_LOOPBACK_DISK_SIZE_DEFAULT}
 
 # Set ``SWIFT_EXTRAS_MIDDLEWARE`` to extras middlewares.
-# Default is ``staticweb, tempurl, formpost``
-SWIFT_EXTRAS_MIDDLEWARE=${SWIFT_EXTRAS_MIDDLEWARE:-tempurl formpost staticweb}
+# Default is ``staticweb, formpost``
+SWIFT_EXTRAS_MIDDLEWARE=${SWIFT_EXTRAS_MIDDLEWARE:-formpost staticweb}
 
 # Set ``SWIFT_EXTRAS_MIDDLEWARE_LAST`` to extras middlewares that need to be at
 # the end of the pipeline.