fix: fix logger in destination

Author: yuhao900914

Sources/Amplitude/Plugins/AmplitudeDestinationPlugin.swift

@@ -16,7 +16,7 @@ public class AmplitudeDestinationPlugin: DestinationPlugin {
             if e.isValid() {
                 pipeline?.put(event: e)
             } else {
-                logger.error(message: "Event is invalid for missing information like userId and deviceId")
+                logger?.error(message: "Event is invalid for missing information like userId and deviceId")
             }
         }
 

Sources/Amplitude/Plugins/DestinationPlugin.swift

@@ -15,8 +15,8 @@ extension DestinationPlugin {
         return true
     }
 
-    var logger: (any Logger) {
-        return self.amplitude?.logger ?? ConsoleLogger()
+    var logger: (any Logger)? {
+        return self.amplitude?.logger
     }
 
     @discardableResult