remove .system-version

src/client/js/legacy/crowi.js

@@ -106,7 +106,7 @@ Crowi.initClassesByOS = function() {
   const platform = navigator.platform.toLowerCase();
   const isMac = (platform.indexOf('mac') > -1);
 
-  document.querySelectorAll('.system-version .cmd-key').forEach((element) => {
+  document.querySelectorAll('.cmd-key').forEach((element) => {
     if (isMac) {
       element.classList.add('mac');
     }

src/client/styles/scss/_layout.scss

@@ -100,14 +100,3 @@ body {
     }
   }
 }
-
-.system-version {
-  position: fixed;
-  right: 0.5em;
-  bottom: 0;
-  opacity: 0.6;
-
-  > span {
-    margin-left: 0.5em;
-  }
-}