No mask for active branches

Author: encukou

_tools/release_cycle_template.svg.jinja

@@ -136,7 +136,6 @@
                 height="{{ height }}"
                 rx="{{ radius }}"
                 ry="{{ radius }}"
-                mask="url(#release-cycle-mask-{{ id_key }})"
             />
         {% else %}
             <!-- For EOL releases, use a single rounded rectangle -->