Merge bitcoin-core/gui-qml#473: qml: Remove duplicate property in BlockClock

cc03c94 qml: Remove duplicate property in BlockClock (johnny9)

Pull request description:

ACKs for top commit:
  hebasto:
    ACK cc03c94.

Tree-SHA512: c65e4505c944c76bb0c51eb2ad1ee99d3806bbd61e219bf1c10aacc118cb60d3427c17953d7df47d95fcc1ee481380cc171d9effcf09fde3cb52c4f5bdc5b866

Author: hebasto

qml/components/BlockClock.qml

@@ -24,7 +24,6 @@ Item {
     property alias header: mainText.text
     property alias headerSize: mainText.font.pixelSize
     property alias subText: subText.text
-    property int headerSize: 32
     property bool connected: nodeModel.numOutboundPeers > 0
     property bool synced: nodeModel.verificationProgress > 0.999
     property string syncProgress: formatProgressPercentage(nodeModel.verificationProgress * 100)