Remove legacy browser metrics

These are no longer being emitted by the browser module. Web vitals are
the primary way to determine how well the website is performing.

Author: ankur22

src/data/markdown/translated-guides/en/02 Using k6/02 Metrics/000-reference.md

@@ -69,22 +69,6 @@ Apart from the Core Web Vitals, the browser module also reports [Other Web Vital
 | webvital_first_contentful_paint      | Measures the time it takes for the browser to render the first DOM element on the page, whether that's a text, image or header. Please refer to [First Contentful Paint](https://web.dev/fcp/) for more information.  |
 | webvital_interaction_to_next_paint   | An experimental metric that measures a page's responsiveness. Please refer to [Interaction to Next Paint](https://web.dev/inp/) for more information.  |
 
-### Legacy browser metrics
-
-<Blockquote mod="note" title="">
-
-  As of [k6 version 0.44.0](https://github.com/grafana/k6/releases/tag/v0.44.0), k6 now natively supports [Google's Core Web Vitals](https://web.dev/vitals/#core-web-vitals). In future releases, to align with recommended practices, we will remove the following browser metrics to focus on the web vital metrics. Please refer to [#831](https://github.com/grafana/xk6-browser/issues/831) for more information.
-
-</Blockquote>
-
-Apart from the usual HTTP specific metrics that k6 already tracks, the browser module tracks the following browser specific performance metrics on top:
-
-| Metric Name                    |  Description                                                                                                 |
-|--------------------------------|--------------------------------------------------------------------------------------------------------------|
-| browser_dom_content_loaded     | Emitted when the page is loaded but scripts have just started to be executed.                                |
-| browser_first_paint            | Emitted when the browser renders the first pixel on the page.                                                |
-| browser_loaded                 | Emitted when the page is fully loaded.                                                                       |
-
 
 ## Built-in WebSocket metrics {#websockets}
 

src/data/markdown/translated-guides/en/03 Using k6 browser/01 Overview.md

@@ -92,9 +92,6 @@ default ✓ [===============================] 1 VUs  00m01.9s/10m0s  1/1 iters,
 
      ✓ header
 
-     browser_dom_content_loaded.............................: avg=63.74ms  min=2.11ms   med=21.66ms  max=167.44ms p(90)=138.28ms p(95)=152.86ms
-     browser_first_paint....................................: avg=72.62ms  min=41.31ms  med=72.62ms  max=103.94ms p(90)=97.67ms  p(95)=100.8ms
-     browser_loaded.........................................: avg=63.16ms  min=6.52ms   med=15.98ms  max=166.98ms p(90)=136.78ms p(95)=151.88ms
      checks.................................................: 100.00% ✓ 1        ✗ 0
      data_received..........................................: 5.8 kB  659 B/s
      data_sent..............................................: 2.6 kB  291 B/s

src/data/markdown/translated-guides/en/03 Using k6 browser/03 Metrics.md

@@ -41,9 +41,6 @@ In future releases, the `browser_*` metrics will be removed in favor of the web
 </Blockquote>
 
 ```bash
-  browser_dom_content_loaded.............................: avg=63.74ms  min=2.11ms   med=21.66ms  max=167.44ms p(90)=138.28ms p(95)=152.86ms
-  browser_first_paint....................................: avg=72.62ms  min=41.31ms  med=72.62ms  max=103.94ms p(90)=97.67ms  p(95)=100.8ms
-  browser_loaded.........................................: avg=63.16ms  min=6.52ms   med=15.98ms  max=166.98ms p(90)=136.78ms p(95)=151.88ms
   webvital_cumulative_layout_shift.......................: avg=0        min=0        med=0        max=0        p(90)=0        p(95)=0
   webvital_cumulative_layout_shift_good..................: 1       0.113248/s
   webvital_first_contentful_paint........................: avg=415.35ms min=302ms    med=415.35ms max=528.7ms  p(90)=506.03ms p(95)=517.36ms