Remove record_tag_helper

It was only used in one place, and could easily be replaced.

Note we usually use HTML classes like `map-location` instead of
`map_location`, but I've kept the underscore for compatibility with the
previous version.

app/helpers/map_locations_helper.rb

@@ -26,10 +26,10 @@ module MapLocationsHelper
 
   def render_map(map_location, parent_class, editable, remove_marker_label, investments_coordinates=nil)
     map_location = MapLocation.new if map_location.nil?
-    map = content_tag_for :div,
-                          map_location,
-                          class: "map",
-                          data: prepare_map_settings(map_location, editable, parent_class, investments_coordinates)
+    map = content_tag :div, "",
+                      id: dom_id(map_location),
+                      class: "map_location map",
+                      data: prepare_map_settings(map_location, editable, parent_class, investments_coordinates)
     map += map_location_remove_marker(map_location, remove_marker_label) if editable
     map
   end