How to Remove "Showing posts with label" in archive posts

Step 1. 

Go to Dashboard > Template > Edit HTML
             Expand Widget Template.

Step 2. 

Now find these codes in your template. use (CTRL+F).

<b:includable id=’status-message’>
  <b:if cond=’data:navMessage’>
  <div class=’status-msg-wrap’>
    <div class=’status-msg-body’>
      <data:navMessage/>
    </div>
    <div class=’status-msg-border’>
      <div class=’status-msg-bg’>
        <div class=’status-msg-hidden’><data:navMessage/></div>
      </div>
    </div>
  </div>
  <div style=’clear: both;’/>
  </b:if>
</b:includable>

Step 3. 

Now Replace this with this code with following code..

<b:includable id=’status-message’>
<b:if cond=’data:navMessage’>
<div>
</div>
<div style=’clear: both;’/>
</b:if>
</b:includable>

Step 4.

Now Save the template and check if the message has been removed or not by clicking any label of the blog.