feat: made all the cohort pages public

There is some info on the page that is only accessible to mentors and
admins and not shown to other users.

school/www/cohorts/cohort.py

@@ -3,10 +3,6 @@ from . import utils
 
 def get_context(context):
     context.no_cache = 1
-    if frappe.session.user == "Guest":
-        frappe.local.flags.redirect_location = "/login?redirect-to=" + frappe.request.path
-        raise frappe.Redirect()
-
     course = utils.get_course()
     cohort = course and utils.get_cohort(course, frappe.form_dict["cohort"])
     if not cohort:
@@ -18,9 +14,6 @@ def get_context(context):
     is_mentor = mentor is not None
     is_admin = cohort.is_admin(user) or "System Manager" in frappe.get_roles()
 
-    if not is_admin and not is_mentor :
-        frappe.throw("Permission Deined", frappe.PermissionError)
-
     utils.add_nav(context, "All Courses", "/courses")
     utils.add_nav(context, course.title, "/courses/" + course.name)
     utils.add_nav(context, "Cohorts", "/courses/" + course.name + "/manage")