Don't throw an exception when deleting the crashtracking key

Author: andrewlock

tracer/src/Datadog.FleetInstaller/RegistryHelper.cs

@@ -51,7 +51,7 @@ public static bool RemoveCrashTrackingKey(ILogger log, TracerValues values, stri
         try
         {
             var key = Registry.LocalMachine.OpenSubKey(registryKeyName, writable: true);
-            key?.DeleteValue(crashHandlerPath);
+            key?.DeleteValue(crashHandlerPath, throwOnMissingValue: false);
             log.WriteInfo($"Crash tracking handler path '{crashHandlerPath}' removed from '{registryKeyName}'");
 
             return true;
@@ -83,6 +83,8 @@ public static bool TryGetIisVersion(ILogger log, [NotNullWhen(true)] out Version
             var minor = key.GetValue("MinorVersion") as int? ?? 0;
 
             version = new(major: major, minor: minor);
+
+            log.WriteInfo($"Found IIS version: '{major}.{minor}'");
             return true;
         }
         catch (Exception ex)