removing timestamp field since as it is duplicate (#8379)

Author: soninaren

src/WebJobs.Script.WebHost/Diagnostics/DiagnosticEvent.cs

@@ -17,12 +17,11 @@ public DiagnosticEvent(string hostId, DateTime timestamp)
         {
             RowKey = TableStorageHelpers.GetRowKey(timestamp);
             PartitionKey = $"{hostId}-{timestamp:yyyyMMdd}";
+            Timestamp = timestamp;
         }
 
         public int HitCount { get; set; }
 
-        public DateTimeOffset TimeStamp { get; set; }
-
         public string Message { get; set; }
 
         public string ErrorCode { get; set; }

src/WebJobs.Script.WebHost/Diagnostics/DiagnosticEventTableStorageRepository.cs

@@ -184,7 +184,6 @@ public void WriteDiagnosticEvent(DateTime timestamp, string errorCode, LogLevel
             {
                 ErrorCode = errorCode,
                 HelpLink = helpLink,
-                TimeStamp = timestamp,
                 Message = message,
                 LogLevel = level,
                 Details = exception?.ToFormattedString(),

test/WebJobs.Script.Tests.Integration/Diagnostics/DiagnosticEventTableStorageRepositoryTests.cs

@@ -231,7 +231,6 @@ public async Task ExecuteBatchAsync_WritesToTableStorage()
 
             var dateTime = DateTime.UtcNow;
             var diagnosticEvent = new DiagnosticEvent("hostId", dateTime);
-            diagnosticEvent.TimeStamp = dateTime;
             var events = new ConcurrentDictionary<string, DiagnosticEvent>();
             events.TryAdd("EC123", diagnosticEvent);
             await repository.ExecuteBatchAsync(events, table);

test/WebJobs.Script.Tests/Diagnostics/DiagnosticEventLoggerTests.cs

@@ -84,7 +84,6 @@ public void WriteDiagnosticEvent(DateTime timestamp, string errorCode, LogLevel
             {
                 _events.Add(new DiagnosticEvent("hostid", timestamp)
                 {
-                    TimeStamp = timestamp,
                     ErrorCode = errorCode,
                     LogLevel = level,
                     Message = message,