remove else from img shortcode

Author: somatorio

themes/devopsdays-theme/layouts/shortcodes/img.html

@@ -3,6 +3,4 @@
 {{ $alt := .Get "alt" }}
 {{ if $image }}
 <img src="{{ $image.RelPermalink }}" class="{{ $class }}" alt="{{ $alt }}">
-{{ else }}
-<strong>Failed to find image</strong>
 {{ end }}