docs(metrics): remove unsupported set type (#16056)

Author: Flash0ver

develop-docs/sdk/telemetry/metrics.mdx

@@ -552,7 +552,7 @@ If `debug` is set to `true` in SDK init, calls to the Sentry metrics API should
       "span_id": "b0e6f15b45c36b12",
       "name": "active.users",
       "value": 12345,
-      "type": "set",
+      "type": "gauge",
       "attributes": {
         "cohort": { "value": "beta", "type": "string" },
         "sentry.sdk.name": { "value": "sentry.javascript.browser", "type": "string" },

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

@@ -11,7 +11,7 @@ notSupported:
   - javascript.capacitor
 ---
 
-With [Sentry Metrics](/product/explore/metrics/), you can send counters, gauges, distributions, and sets from your applications to Sentry. Once in Sentry, these metrics can be viewed alongside relevant errors, and searched using their individual attributes.
+With [Sentry Metrics](/product/explore/metrics/), you can send counters, gauges, and distributions from your applications to Sentry. Once in Sentry, these metrics can be viewed alongside relevant errors, and searched using their individual attributes.
 
 <Alert>
 This feature is currently in open beta. Please reach out on [GitHub](https://github.com/getsentry/sentry-javascript/discussions/18055) if you have feedback or questions. Features in beta are still in-progress and may have bugs. We recognize the irony.

docs/platforms/react-native/metrics/index.mdx

@@ -7,7 +7,7 @@ sidebar_section: features
 beta: true
 ---
 
-With Sentry Metrics, you can send counters, gauges, distributions, and sets from your applications to Sentry. Once in Sentry, these metrics can be viewed alongside relevant errors, and searched using their individual attributes.
+With Sentry Metrics, you can send counters, gauges, and distributions from your applications to Sentry. Once in Sentry, these metrics can be viewed alongside relevant errors, and searched using their individual attributes.
 
 <Alert>This feature is currently in open beta.</Alert>