unused css removed

osem-admin was not included in application.css neither in any other place, so it is not used. Some .css from osem-schedule-print do no exit since we merged https://github.com/openSUSE/osem/pull/1030

app/assets/stylesheets/osem-admin.css.scss

@@ -1,59 +0,0 @@
-.flex-col {
-  display: flex;
-  display: -webkit-flex;
-  flex: 1 100%;
-  flex-flow: column nowrap;
-}
-
-.flex-grow {
-  display: flex;
-  -webkit-flex: 2;
-  flex: 2;
-}
-
-.row-flex, .row-flex > div[class*='col-'] {
-  display: -webkit-box;
-  display: -moz-box;
-  display: -ms-flexbox;
-  display: -webkit-flex;
-  display: flex;
-  flex:1 1 auto;
-}
-
-.row-flex-wrap {
-  -webkit-flex-flow: row wrap;
-  align-content: flex-start;
-  flex:0;
-}
-
-.row-flex > div[class*='col-'], .container-flex > div[class*='col-'] {
-  margin:-.2px; /* hack adjust for wrapping */
-}
-
-.nav-header-bigger {
-    font-size: 15px;
-    font-weight: bold;
-    text-transform: uppercase;
-}
-
-.mySidebar {
-  .fa {
-    margin-right: 10px;
-  }
-  hr {
-    margin: 1px;
-  }
-}
-
-.dl-horizontal dt { white-space: normal; }
-
-.table20 {
-  width: 20%;
-}
-
-
-@media only screen and (max-width: 768px) {
-    .mySidebar ul.subNav {
-        display: block;
-    }
-}

app/assets/stylesheets/osem-schedule-print.css

@@ -46,19 +46,9 @@
 .event img, .img-circle {
    display: none;
 }
-h5 {
-   font-size: 10px;
-   line-height: 12px;
-   margin: 0px;
-}
 .table th, .table td {
    line-height: 12px;
    padding: 3px;
 }
 
-.schedule-speaker {
-   font-weight: normal;
-   font-style: italic;
-}
-
 }