Removing redundant metrics in examples.

Author: codyde

docs/platforms/javascript/common/tracing/span-metrics/examples.mdx

@@ -257,11 +257,6 @@ Sentry.startSpan(
       "ui.form_completion_time_ms": 45000,
       "ui.payment_method_changes": 1,
       "ui.address_validation_retries": 0,
-
-      // Client performance
-      "client.page_load_time_ms": 850,
-      "client.payment_widget_load_ms": 650,
-      "client.total_interaction_time_ms": 120000,
     },
   },
   async () => {
@@ -291,7 +286,6 @@ Sentry.startSpan(
       "payment.processing_time_ms": 1200,
 
       // Inventory checks
-      "inventory.check_time_ms": 150,
       "inventory.all_available": true,
 
       // Fulfillment