Bug 1352501 - Remove Reader Mode promotion panel. r=jaws,MattN

Note that the UITour library can still show a panel in the event that we want to
promote the feature that way.

MozReview-Commit-ID: FzKSzO987h7

testing/marionette/client/marionette_driver/geckoinstance.py

@@ -431,9 +431,6 @@ class DesktopInstance(GeckoInstance):
         # in general can"t hurt - we re-enable them when tests need them
         "browser.pagethumbnails.capturing_disabled": True,
 
-        # Avoid performing Reader Mode intros during tests
-        "browser.reader.detectedFirstArticle": True,
-
         # Disable safebrowsing components
         "browser.safebrowsing.blockedURIs.enabled": False,
         "browser.safebrowsing.downloads.enabled": False,

testing/marionette/server.js

@@ -94,9 +94,6 @@ const RECOMMENDED_PREFS = new Map([
   // thumbnails in general cannot hurt
   ["browser.pagethumbnails.capturing_disabled", true],
 
-  // Avoid performing Reader Mode intros during tests
-  ["browser.reader.detectedFirstArticle", true],
-
   // Disable safebrowsing components.
   //
   // These should also be set in the profile prior to starting Firefox,

testing/profiles/prefs_general.js

@@ -323,9 +323,6 @@ user_pref("dom.ipc.tabs.shutdownTimeoutSecs", 0);
 // Don't block add-ons for e10s
 user_pref("extensions.e10sBlocksEnabling", false);
 
-// Avoid performing Reader Mode intros during tests.
-user_pref("browser.reader.detectedFirstArticle", true);
-
 // Make tests run consistently on DevEdition (which has a lightweight theme
 // selected by default).
 user_pref("lightweightThemes.selectedThemeID", "");