Remember diff view style (#163)

routers/repo/commit.go

@@ -180,7 +180,6 @@ func Diff(ctx *context.Context) {
 	}
 
 	ctx.Data["CommitID"] = commitID
-	ctx.Data["IsSplitStyle"] = ctx.Query("style") == "split"
 	ctx.Data["Username"] = userName
 	ctx.Data["Reponame"] = repoName
 	ctx.Data["IsImageFile"] = commit.IsImageFile
@@ -239,7 +238,6 @@ func CompareDiff(ctx *context.Context) {
 	}
 	commits = models.ValidateCommitsWithEmails(commits)
 
-	ctx.Data["IsSplitStyle"] = ctx.Query("style") == "split"
 	ctx.Data["CommitRepoLink"] = ctx.Repo.RepoLink
 	ctx.Data["Commits"] = commits
 	ctx.Data["CommitCount"] = commits.Len()