U4-8226 - Remove all unused/un-needed webforms files from the Umbraco.Web and Umbraco.Web.UI projects

@Shandem If no one else is up for it I feel like deleting some more stuff :)

Whoohoo! Assigned :)

PR: https://github.com/umbraco/Umbraco-CMS/pull/1196

Goodbye, old code; we've fought our last together, You've struggled bravely, but you've got to die! Old code, it almost breaks my heart to leave you, Without one other word, except "Goodbye"

Goodbye, old code; we've kept up well together, And always shared whatever's come our way, We came to help old Umbraco fight the PHPs, And up to now we've kept 'em well at bay.

Goodbye, old code; I know you're going to suffer, For there are great tears in your eyes, I wish you understood that 'tis for Umbraco That every hero fights, and bleeds, and dies!

Goodbye, old code; you won't be here much longer, You've got to go, old code, and go alone, We've always had our troubles both together, And life won't seem the same when you are gone!

Goodbye, old code; I wish that you could answer, And tell me all your brown eyes try to say. You know, old code, I've seen a lot of suffering, But never felt just like I feel today.

(thanks to http://www.scotlandswar.ed.ac.uk/sites/default/files/pdf_Horses.pdf)

Have pulled that first PR in, i'll move this task back to Open and wait for the next one :)