remove unused file

resources/public/css/devmode.css

@@ -1,21 +0,0 @@
-.devbar {
-  position: fixed;
-  bottom: 0;
-  left: 0;
-  width: 100%;
-  font-family: monospace;
-  background-color: #ccc;
-}
-.devbar ol {
-  list-style-type: none;
-  padding: 0;
-  margin: 0;
-}
-.devbar ol li {
-  padding: .5rem;
-  border: 1px solid black;
-  margin: .5rem;
-}
-.devbar ol li pre {
-  margin: 0;
-}