1). Backup your template.
2). Copy the below code and find the code in your template using (Ctrl+F)
<b:includable id='status-message'>3). Now click the arrow button which is the row of you found code. Like this,
4). Now you can see the code like this below after clicked the arrow,
5). Replace all the above code with the following code;
6). Now save your template and view your blog.<b:includable id='status-message'>
<div style='clear: both;'/>
7). Now you couldn't see the "showing posts with label". That's it.