Remove POST /docs custom handler, now handled by redirects

Implementing a system for signing into v1 via v2 using POSTs so the
unauthenticated route is no longer necessary

services/web/app/coffee/infrastructure/RedirectManager.coffee

@@ -15,7 +15,7 @@ module.exports = RedirectManager =
 			if typeof target is 'string'
 				url = target
 			else
-				if req.method == "POST"
+				if req.method != "GET"
 					code = 307
 
 				if typeof target.url == "function"

services/web/app/coffee/router.coffee

@@ -331,12 +331,6 @@ module.exports = class Router
 			AuthenticationController.httpAuth,
 			CompileController.getFileFromClsiWithoutUser
 
-		# We want to redirect POST and GET to different locations, but this is
-		# unsupported by RedirectManager. Therefore we redirect GETs with
-		# RedirectManager and POSTs with this custom route
-		publicApiRouter.post '/docs', (req, res, next) ->
-			res.redirect(307, "#{Settings.overleaf.host}/docs")
-
 		webRouter.get '/teams', (req, res, next) ->
 			# Match v1 behaviour - if the user is signed in, show their teams list
 			# Otherwise show some information about teams