Removes some redundant words

This patch removes some redundant words.

Change-Id: Iba1495a2ab0e350fdeafa06ac60f14a2d851042d

horizon/exceptions.py

@@ -223,7 +223,7 @@ def handle_unauthorized(request, message, redirect, ignore, escalate, handled,
     if escalate:
         # Prevents creation of circular import. django.contrib.auth
         # requires openstack_dashboard.settings to be loaded (by trying to
-        # access settings.CACHES in in django.core.caches) while
+        # access settings.CACHES in django.core.caches) while
         # openstack_dashboard.settings requires django.contrib.auth to be
         # loaded while importing openstack_auth.utils
         from django.contrib.auth import logout  # noqa

releasenotes/notes/bp-cache-templates-4ab00dcda195a03a.yaml

@@ -4,5 +4,5 @@ features:
     See https://docs.djangoproject.com/en/1.8/ref/templates/api/#django.template.loaders.cached.Loader
 upgrade:
   - Custom template tags must have a thread-safe Node implementation to work
-    with the the cached loader. See
+    with the cached loader. See
     https://docs.djangoproject.com/en/1.8/howto/custom-template-tags/#template-tag-thread-safety

releasenotes/notes/hz-select-fixes-c9bfe6a53e0daa20.yaml

@@ -7,4 +7,4 @@ fixes:
   - The property `selections` tracks the checkbox selection state of each row.
   - The property `selected` is now a list of selected rows.
   - The property `numSelected` has been removed, use `selected.length` instead.
-  - The `select` method has been renamed to to `toggleSelect`.
+  - The `select` method has been renamed to `toggleSelect`.