Fix build issue when specifying -p:TargetModule (#23641)

Author: vidai-msft

tools/BuildPackagesTask/Microsoft.Azure.Build.Tasks/CIFilterTask.cs

@@ -179,10 +179,7 @@ private List<string> GetTestCsprojList(string moduleName, Dictionary<string, str
         {
             List<string> csprojList = GetRelatedCsprojList(moduleName, csprojMap)
                 .Where(x => x.Contains("Test")).ToList();
-            if (csprojList.Count == 0)
-            {
-                csprojList.Add(moduleName);
-            }
+
             return csprojList;
         }