Add max-empty-lines and no-eol-whitespace to stylelint (#7034)

res/css/structures/_CreateRoom.scss

@@ -34,4 +34,3 @@ limitations under the License.
 .mx_CreateRoom_description {
     width: 330px;
 }
-

res/css/structures/_LeftPanel.scss

@@ -43,8 +43,6 @@ $roomListCollapsedWidth: 68px;
     }
 }
 
-
-
 .mx_LeftPanel {
     background-color: $roomlist-bg-color;
     // TODO decrease this once Spaces launches as it'll no longer need to include the 56px Community Panel

res/css/structures/_RoomView.scss

@@ -32,7 +32,6 @@ limitations under the License.
     position: relative;
 }
 
-
 @keyframes mx_RoomView_fileDropTarget_animation {
     from {
         opacity: 0;
@@ -112,7 +111,6 @@ limitations under the License.
     max-width: 1920px !important;
 }
 
-
 .mx_RoomView .mx_MainSplit {
     flex: 1 1 0;
 }

res/css/structures/_SpacePanel.scss

@@ -348,7 +348,6 @@ $activeBorderColor: $secondary-content;
     }
 }
 
-
 .mx_SpacePanel_sharePublicSpace {
     margin: 0;
 }