(maint) Delete .rb file that was probably commited by accident

Extension of the file is .rb but should be .erb, so I guess thir file
was committed by accident.

lib/puppet_x/puppetlabs/strings/yard/templates/default/provider/html/command_details.rb

@@ -1,12 +0,0 @@
-<h2>Parameter Summary</h2>
-<div class="tags">
-  <ul class="param">
-    <%= @html_helper.generate_parameters(@param_details, object) %>
-  </ul>
-</div>
-<h2>Features</h2>
-<div class="tags">
-  <ul class="feature">
-    <%= @html_helper.generate_features(@feature_details, object) %>
-  </ul>
-</div>