Remove "teaser-history" experiment

services/web/app/views/project/editor/history.pug

@@ -33,7 +33,6 @@ div#history(ng-show="ui.view == 'history'")
 						href
 						ng-class="buttonClass"
 						ng-click="startFreeTrial('history')"
-						sixpack-convert="teaser-history"
 					) #{translate("start_free_trial")}
 
 			.message(ng-show="project.owner._id != user.id")

services/web/public/coffee/main/account-upgrade.coffee

@@ -24,10 +24,6 @@ define [
 						sixpack.participate 'teaser-dropbox-text', ['default', 'dropbox-focused'], (variant) ->
 							event_tracking.sendMB "subscription-start-trial", { source, plan, variant }
 
-					when "history"
-						sixpack.participate 'teaser-history', ['default', 'focused'], (variant) ->
-							event_tracking.sendMB "subscription-start-trial", { source, plan, variant }
-
 					else
 						event_tracking.sendMB "subscription-start-trial", { source, plan }