[Bug 1885857] Remove non standard page load events (#2158)

* Stop using non standard (app defined) page load events

  - Fixes https://bugzilla.mozilla.org/show_bug.cgi?id=1885857
  - Left the metrics.yaml and pings.yaml files but removed everything from them
    to allow experimenting with events in future without making changes to
    builtin Glean events

src/telemetry/index.js

@@ -8,10 +8,6 @@ import GleanMetrics from "@mozilla/glean/metrics";
 
 import { googleAnalytics } from "./ga";
 
-// Glean generated metrics and pings files
-import * as pageMetrics from "./generated/page";
-import { pageView as pageViewPing } from "./generated/pings";
-
 // detecting "do not track" via these instructions:
 // https://dev.to/corbindavenport/how-to-correctly-check-for-do-not-track-with-javascript-135d
 const isDNTEnabled =
@@ -66,12 +62,6 @@ export function submitPageViewTelemetry(path) {
     });
   }
 
-  // Use the standard events.
+  // Use the standard (built-in Glean) page load events.
   GleanMetrics.pageLoad({ url: path });
-
-  // Send telemetry to Glean.
-  pageMetrics.loaded.set();
-  // Remove query params and trailing `/` characters.
-  pageMetrics.path.set(path.split("?")[0].replace(/\/$/, ""));
-  pageViewPing.submit();
 }

src/telemetry/metrics.yaml

@@ -4,41 +4,3 @@
 
 ---
 $schema: moz://mozilla.org/schemas/glean/metrics/2-0-0
-
-page:
-  loaded:
-    type: datetime
-    lifetime: ping
-    send_in_pings:
-      - page-view
-    description: |
-      The time the page was loaded.
-    bugs:
-      - https://bugzilla.mozilla.org/show_bug.cgi?id=1741582
-    data_reviews:
-      - https://github.com/mozilla/glean-dictionary/pull/1015#issuecomment-996051009
-    data_sensitivity:
-      - interaction
-    notification_emails:
-      - brizental@mozilla.com
-      - glean-team@mozilla.com
-    expires: never
-  path:
-    type: string
-    lifetime: ping
-    send_in_pings:
-      - page-view
-    description: |
-      The path of the page that was loaded.
-
-      Query arguments will be stripped before recording.
-    bugs:
-      - https://bugzilla.mozilla.org/show_bug.cgi?id=1741582
-    data_reviews:
-      - https://github.com/mozilla/glean-dictionary/pull/1015#issuecomment-996051009
-    data_sensitivity:
-      - interaction
-    notification_emails:
-      - brizental@mozilla.com
-      - glean-team@mozilla.com
-    expires: never

src/telemetry/pings.yaml

@@ -4,16 +4,3 @@
 
 ---
 $schema: moz://mozilla.org/schemas/glean/pings/2-0-0
-
-page-view:
-  description: |
-    A ping that will be sent everytime a new page is visited.
-  include_client_id: true
-  send_if_empty: false
-  bugs:
-    - https://bugzilla.mozilla.org/show_bug.cgi?id=1741582
-  data_reviews:
-    - https://github.com/mozilla/glean-dictionary/pull/1015#issuecomment-996051009
-  notification_emails:
-    - brizental@mozilla.com
-    - glean-team@mozilla.com