only message char count

Author: chungjac

telemetry/definitions/commonDefinitions.json

@@ -1097,14 +1097,9 @@
             "description": "True if the code snippet that user interacts with has a reference."
         },
         {
-            "name": "cwsprChatHistoryCharacterCount",
+            "name": "cwsprChatHistoryMessageCharacterCount",
             "type": "int",
-            "description": "The total number of characters in the history"
-        },
-        {
-            "name": "cwsprChatHistoryMessageCharacterCounts",
-            "type": "string",
-            "description": "An array of numbers where each number represents the number of characters in a message in the history"
+            "description": "The number of characters in a history message"
         },
         {
             "name": "cwsprChatInteractionTarget",
@@ -2310,11 +2305,7 @@
                     "required": false
                 },
                 {
-                    "type": "cwsprChatHistoryCharacterCount",
-                    "required": false
-                },
-                {
-                    "type": "cwsprChatHistoryMessageCharacterCounts",
+                    "type": "cwsprChatHistoryMessageCharacterCount",
                     "required": false
                 },
                 {