Bug 1485695 - Remove unused uptime property from the main ping. r=Dexter

Differential Revision: https://phabricator.services.mozilla.com/D4296

--HG--
extra : moz-landing-system : lando

toolkit/components/telemetry/docs/data/main-ping.rst

@@ -149,10 +149,6 @@ totalTime
 ~~~~~~~~~
 A non-monotonic integer representing the number of seconds the session has been alive.
 
-uptime
-~~~~~~
-A non-monotonic integer representing the number of minutes the session has been alive.
-
 addonManager
 ~~~~~~~~~~~~
 Only available in the extended set of measures, it contains a set of counters related to Addons. See `here <https://dxr.mozilla.org/mozilla-central/search?q=%22AddonManagerPrivate.recordSimpleMeasure%22&redirect=false&case=true>`__ for a list of recorded measures.

toolkit/components/telemetry/pings/TelemetrySession.jsm

@@ -745,7 +745,6 @@ var Impl = {
     let elapsedTime = Date.now() - si.process;
     var ret = {
       totalTime: Math.round(elapsedTime / 1000), // totalTime, in seconds
-      uptime: Math.round(elapsedTime / 60000), // uptime in minutes
     };
 
     // Look for app-specific timestamps

toolkit/components/telemetry/tests/unit/test_TelemetrySession.js

@@ -280,7 +280,6 @@ function checkPayload(payload, reason, successfulPings) {
   checkPayloadInfo(payload.info, reason);
 
   Assert.ok(payload.simpleMeasurements.totalTime >= 0);
-  Assert.ok(payload.simpleMeasurements.uptime >= 0);
   Assert.equal(payload.simpleMeasurements.startupInterrupted, 1);
   Assert.equal(payload.simpleMeasurements.shutdownDuration, SHUTDOWN_TIME);
   Assert.ok("maximalNumberOfConcurrentThreads" in payload.simpleMeasurements);