availability: add OWNERS file for availability package, remove stale views/OWNERS entry

The old per-file rule in cmk/gui/views/OWNERS pointed to the monolithic
availability.py which no longer exists. Add a proper OWNERS file to the
new cmk/gui/availability/ package directory instead.

Change-Id: I2a164f0e19034032c20c08ac56331e7a8b7431a2

Author: loocars

cmk/gui/availability/OWNERS

@@ -0,0 +1,11 @@
+set noparent  # don't inherit owners information from parent folders
+
+file:/component_owners/availability_and_sla/OWNERS_DEFINITION
+
+# Please
+#  - don't add individual owners here but provide a reference to an OWNERS_DEFINITION file instead
+#  - consider a `per-file <PATH>=set noparent` line for each `per-file` rule
+#
+# Find information about code-owners (+ find-owners syntax) here:
+#  - https://android-review.googlesource.com/plugins/code-owners/Documentation/backend-find-owners-cookbook.html
+#  - https://android-review.googlesource.com/plugins/code-owners/Documentation/backend-find-owners.html#syntax

cmk/gui/views/OWNERS

@@ -2,9 +2,6 @@ set noparent  # don't inherit owners information from parent folders
 
 file:/component_owners/ui_monitoring/OWNERS_DEFINITION
 
-per-file availability.py=set noparent
-per-file availability.py=file:/component_owners/availability_and_sla/OWNERS_DEFINITION
-
 # Please
 #  - don't add individual owners here but provide a reference to an OWNERS_DEFINITION file instead
 #  - consider a `per-file <PATH>=set noparent` line for each `per-file` rule