--- a/browser/components/sessionstore/SessionFile.jsm
+++ b/browser/components/sessionstore/SessionFile.jsm
@@ -362,17 +362,16 @@ var SessionFileInternal = {
   _checkWorkerHealth() {
     if (this._workerHealth.failures >= kMaxWriteFailures) {
       SessionWorker.terminate();
       // Flag as not-initialized, to ensure that the worker state init is performed
       // upon the next request.
       this._initializationStarted = false;
       // Reset the counter and report to telemetry.
       this._workerHealth.failures = 0;
-      Telemetry.scalarAdd("browser.session.restore.worker_restart_count", 1);
     }
   },
 
   write(aData) {
     if (RunState.isClosed) {
       return Promise.reject(new Error("SessionFile is closed"));
     }
 

deleted file mode 100644
--- a/browser/components/sessionstore/test/unit/test_scalar_worker_restarts.js
+++ /dev/null
@@ -1,39 +0,0 @@
-/*
- * The primary purpose of this test is to ensure that the sessionstore component
- * records information about erroneous workers into a scalar.
- */
-
-"use strict";
-const Telemetry = Services.telemetry;
-const ScalarId = "browser.session.restore.worker_restart_count";
-
-// Prepare the session file.
-var profd = do_get_profile();
-ChromeUtils.import("resource:///modules/sessionstore/SessionFile.jsm", this);
-
-/**
- * In order to use browser.session.restore.worker_restart_count scalar, it has
- * to be registered in "toolkit/components/telemetry/Scalars.yaml".
- * This test ensures that the scalar is registered and empty.
- */
-add_task(async function test_ensure_scalar_is_empty() {
-  const scalars = Telemetry.snapshotScalars(Ci.nsITelemetry.DATASET_RELEASE_CHANNEL_OPTOUT, false).parent || {};
-  Assert.ok(!(ScalarId in scalars), "Sanity check; no scalars should be there yet.");
-});
-
-/**
- * Makes sure that the scalar is positively updated when amount of failures
- * becomes higher than the threshold.
- */
-add_task(async function test_worker_restart() {
-  let backstagePass = ChromeUtils.import("resource:///modules/sessionstore/SessionFile.jsm", {});
-  backstagePass.SessionFileInternal._workerHealth.failures = backstagePass.kMaxWriteFailures + 1;
-  backstagePass.SessionFileInternal._checkWorkerHealth();
-
-  Assert.equal(backstagePass.SessionFileInternal._workerHealth.failures, 0,
-    "Worker failure count should've been reset.");
-
-  // Checking if the scalar is positively updated.
-  const scalars = Telemetry.snapshotScalars(Ci.nsITelemetry.DATASET_RELEASE_CHANNEL_OPTOUT, false).parent;
-  Assert.equal(scalars[ScalarId], 1, "Should be increased with one hit.");
-});

--- a/browser/components/sessionstore/test/unit/xpcshell.ini
+++ b/browser/components/sessionstore/test/unit/xpcshell.ini
@@ -5,13 +5,12 @@ skip-if = toolkit == 'android'
 support-files =
   data/sessionCheckpoints_all.json
   data/sessionstore_invalid.js
   data/sessionstore_valid.js
 
 [test_backup_once.js]
 [test_histogram_corrupt_files.js]
 [test_migration_lz4compression.js]
-[test_scalar_worker_restarts.js]
 [test_shutdown_cleanup.js]
 [test_startup_nosession_async.js]
 [test_startup_session_async.js]
 [test_startup_invalid_session.js]

--- a/toolkit/components/telemetry/Scalars.yaml
+++ b/toolkit/components/telemetry/Scalars.yaml
@@ -358,34 +358,16 @@ browser.usage:
     kind: uint
     notification_emails:
       - bsmedberg@mozilla.com
     release_channel_collection: opt-out
     record_in_processes:
       - 'main'
       - 'content'
 
-# The following section contains the session restore scalars.
-browser.session.restore:
-  worker_restart_count:
-    bug_numbers:
-      - 1402267
-    description: >
-      A counter incremented every time the SessionFile worker is restarted due
-      to too many failures, as defined in the browser.sessionstore.max_write_failures
-      pref.
-    expires: "64"
-    kind: uint
-    notification_emails:
-      - mdeboer@mozilla.com
-      - session-restore-telemetry-alerts@mozilla.com
-    release_channel_collection: opt-out
-    record_in_processes:
-      - 'main'
-
 extensions.updates:
   rdf:
     bug_numbers:
       - 1460336
     description: >
       The number of RDF update requsts for a given extension ID.
     expires: "66"
     kind: uint