Remove message on sign-in dialog. and change message in System settings.

src/main/twirl/gitbucket/core/admin/system.scala.html

@@ -24,7 +24,7 @@
               @if(DatabaseConfig.url.startsWith("jdbc:h2:")) {
               <td class="danger">
                 <p>@gitbucket.core.util.DatabaseConfig.url</p>
-                <p>H2 database should be used for evaluation purpose only.</p>
+                <p>Embedded H2 database should be used for evaluation purpose only.</p>
                 <p>
                   Please configure using external database explained <a href="https://github.com/gitbucket/gitbucket/wiki/External-database-configuration">here</a>.
                 </p>

src/main/twirl/gitbucket/core/signin.scala.html

@@ -1,7 +1,6 @@
 @(userName: Option[Any] = None,
   password: Option[Any] = None,
   error: Option[Any] = None)(implicit context: gitbucket.core.controller.Context)
-@import gitbucket.core.util.DatabaseConfig
 @gitbucket.core.html.main("Sign in"){
   <div class="content-wrapper main-center">
     <div class="content body">
@@ -12,12 +11,6 @@
             @Html(information)
           </div>
         }
-        @if(DatabaseConfig.url.startsWith("jdbc:h2:")) {
-          <div class="alert alert-warning">
-            <button type="button" class="close" data-dismiss="alert">&times;</button>
-            H2 database should be used for evaluation purpose only.
-          </div>
-        }
         @gitbucket.core.helper.html.error(error)
         @gitbucket.core.html.signinform(context.settings, userName, password)
       </div>