Remove room description from room header

After using it for some time, I don't think it is really usefull but it
makes the UI more visually heavy, it doesn't show it completely and also
has very bad contrast.

Fix #197

imports/NeoChat/Page/RoomPage.qml

@@ -92,35 +92,6 @@ Kirigami.ScrollablePage {
         }
     }
 
-    titleDelegate: Component {
-        RowLayout {
-            visible: !Kirigami.Settings.isMobile
-            Layout.fillWidth: true
-            Layout.maximumWidth: implicitWidth + 1 // The +1 is to make sure we do not trigger eliding at max width
-            Layout.minimumWidth: 0
-            spacing: Kirigami.Units.gridUnit * 0.8
-            Kirigami.Heading {
-                id: titleLabel
-                level: 2
-                Layout.alignment: Qt.AlignVCenter
-                text: page.title
-                opacity: page.isCurrentPage ? 1 : 0.4
-                maximumLineCount: 1
-                elide: Text.ElideRight
-            }
-            QQC2.Label {
-                Layout.fillWidth: true
-                Layout.alignment: Qt.AlignVCenter
-                anchors.baseline: lineCount < 2 ? titleLabel.baseline : undefined // necessary, since there is no way to do this with Layout.alignment
-                text: currentRoom.topic
-                maximumLineCount: 2
-                wrapMode: Text.Wrap
-                elide: Text.ElideRight
-                color: Kirigami.Theme.disabledTextColor
-                font.pointSize: Kirigami.Theme.defaultFont.pointSize * 0.9
-            }
-        }
-    }
     focus: true
 
     Keys.onTabPressed: {