[VOL-4371]  Voltha protos cleanup

Details can be found at:
https://docs.google.com/document/d/1UzfuiPzxYYTULyERk8nKfgzW9QAnwEdtfw_J4UoFyYo/edit

Change-Id: Iad2efddf306234e282af5d518fd435a6b50b1c41
diff --git a/protos/voltha_protos/omci_alarm_db.proto b/protos/voltha_protos/omci_alarm_db.proto
index 2fd6d57..940a844 100755
--- a/protos/voltha_protos/omci_alarm_db.proto
+++ b/protos/voltha_protos/omci_alarm_db.proto
@@ -20,49 +20,44 @@
 
 package omci;
 
-import "voltha_protos/meta.proto";
-
 
 message AlarmAttributeData {
-    string name        = 1 [(voltha.access) = READ_ONLY];
+    string name        = 1;
     string value       = 2;
 }
 
 message AlarmInstanceData {
-    uint32 instance_id      = 1 [(voltha.access) = READ_ONLY];
+    uint32 instance_id      = 1;
     string created          = 2;
     string modified         = 3;
 
-    repeated AlarmAttributeData attributes = 4
-    [(voltha.child_node) = {key: "name"}];
+    repeated AlarmAttributeData attributes = 4;
 }
 
 message AlarmClassData {
-    uint32 class_id         = 1 [(voltha.access) = READ_ONLY];
+    uint32 class_id         = 1;
 
-    repeated AlarmInstanceData instances= 2
-    [(voltha.child_node) = {key: "instance_id"}];
+    repeated AlarmInstanceData instances= 2;
 }
 
 message AlarmManagedEntity {
-    uint32 class_id  = 1 [(voltha.access) = READ_ONLY];
-    string name      = 2 [(voltha.access) = READ_ONLY];
+    uint32 class_id  = 1;
+    string name      = 2;
 }
 
 message AlarmMessageType {
-    uint32 message_type = 1 [(voltha.access) = READ_ONLY];
+    uint32 message_type = 1;
 }
 
 message AlarmDeviceData {
-    string device_id             = 1 [(voltha.access) = READ_ONLY];
+    string device_id             = 1;
     string created               = 2;
     uint32 last_alarm_sequence   = 3;
     string last_sync_time        = 4;
     uint32 version               = 5;
 
 
-    repeated AlarmClassData classes = 6
-    [(voltha.child_node) = {key: "class_id"}];
+    repeated AlarmClassData classes = 6;
 
     repeated AlarmManagedEntity managed_entities = 7;
     repeated AlarmMessageType message_types = 8;