more explicit

Author: mydea

docs/platforms/javascript/common/tracing/index.mdx

@@ -87,6 +87,7 @@ You can also manually start spans to instrument specific parts of your code. Thi
 If you want to disable tracing, you _should not_ set `tracesSampleRate` at
 all. Setting it to `0` will not disable tracing, it will simply never send any
 traces to Sentry.
+Instead, neither `tracesSampleRate` nor `tracesSampler` should be defined in your SDK config to fully disable tracing.
 
 <PlatformSection
   supported={[