refactor(TreeList): move hardcoded requirements copy into tooltip

Author: toastercup

app/cells/plugins/core/tree/checkboxes.haml

@@ -1,9 +1,6 @@
 = render_label
 = render_tooltip unless @options[:tooltip].nil?
 
-%p
-  Please select 1-2 Categories.
-
 - @options[:metadata]["data"]["tree_array"].each do |node|
   = render_field_id
   = cell(Plugins::Core::CheckboxCell, nil, form: @options[:form], node: node, data: data).(:checkbox)