Bug 1775194 - disable reporting API r=ckerschb

This disables the outdated, incorrect implementation of the
Reporting API. The current implementation was only enabled
on Nightly builds, but given its current state it does not
even make sense there.

Differential Revision: https://phabricator.services.mozilla.com/D149873

modules/libpref/init/StaticPrefList.yaml

@@ -3131,7 +3131,7 @@
 # Reporting API.
 - name: dom.reporting.enabled
   type: RelaxedAtomicBool
-  value: @IS_NIGHTLY_BUILD@
+  value: false
   mirror: always
 
 - name: dom.reporting.testing.enabled