clear help docs counters

Author: paladique

src/GitHub.App/ViewModels/PullRequestDetailViewModel.cs

@@ -481,9 +481,6 @@ IObservable<Unit> DoCheckout(object unused)
             return Observable.Defer(async () =>
             {
                 var localBranches = await pullRequestsService.GetLocalBranches(repository, Model).ToList();
-
-                usageTracker.IncrementPullRequestCheckOutCount(IsFromFork).Forget();
-
                 if (localBranches.Count > 0)
                 {
                     return pullRequestsService.SwitchToBranch(repository, Model);

src/GitHub.VisualStudio/Services/UsageTracker.cs

@@ -353,6 +353,9 @@ static void ClearCounters(UsageModel usage, bool weekly, bool monthly)
             usage.NumberOfForkPullRequestsCheckedOut = 0;
             usage.NumberOfForkPullRequestPulls = 0;
             usage.NumberOfForkPullRequestPushes = 0;
+            usage.NumberOfGitHubPaneHelpClicks = 0;
+            usage.NumberOfWelcomeTrainingClicks = 0;
+            usage.NumberOfWelcomeDocsClicks = 0;
 
             if (weekly)
                 usage.NumberOfStartupsWeek = 0;