Remove redundant title

src/ui/preferences/GeneralSettings.qml

@@ -43,22 +43,6 @@ Rectangle {
             anchors.margins:    ScreenTools.defaultFontPixelWidth
             spacing:            ScreenTools.defaultFontPixelHeight / 2
 
-            QGCLabel {
-                text:   qsTr("General Settings")
-                font.pointSize: ScreenTools.mediumFontPointSize
-            }
-
-            Rectangle {
-                height: 1
-                width:  parent.width
-                color:  qgcPal.text
-            }
-
-            Item {
-                height: ScreenTools.defaultFontPixelHeight / 2
-                width:  parent.width
-            }
-
             //-----------------------------------------------------------------
             //-- Base UI Font Point Size
             Row {

src/ui/preferences/LinkSettings.qml

@@ -59,19 +59,6 @@ Rectangle {
             width:              _linkRoot.width
             anchors.margins:    ScreenTools.defaultFontPixelWidth
             spacing:            ScreenTools.defaultFontPixelHeight / 2
-            QGCLabel {
-                text:   qsTr("Comm Link Settings")
-                font.pointSize: ScreenTools.mediumFontPointSize
-            }
-            Rectangle {
-                height: 1
-                width:  parent.width
-                color:  qgcPal.button
-            }
-            Item {
-                height: ScreenTools.defaultFontPixelHeight / 2
-                width:  parent.width
-            }
             Repeater {
                 model: QGroundControl.linkManager.linkConfigurations
                 delegate:

src/ui/preferences/MavlinkSettings.qml

@@ -40,15 +40,6 @@ Rectangle {
             anchors.margins:    ScreenTools.defaultFontPixelWidth
             anchors.left:       parent.left
             anchors.top:        parent.top
-            QGCLabel {
-                text:   qsTr("MavLink Settings")
-                font.pointSize: ScreenTools.mediumFontPointSize
-            }
-            Rectangle {
-                height: 1
-                width:  parent.width
-                color:  qgcPal.button
-            }
             //-----------------------------------------------------------------
             //-- System ID
             Row {