Override image template to remove wrapping figure .image

agaric/templates/elements/image.html.twig

@@ -0,0 +1,15 @@
+{#
+/**
+ * @file
+ * Default theme implementation of an image.
+ *
+ * Available variables:
+ * - attributes: HTML attributes for the img tag.
+ * - style_name: (optional) The name of the image style applied.
+ *
+ * @see template_preprocess_image()
+ *
+ * @ingroup themeable
+ */
+#}
+<img{{ attributes }} />