Purpose

To hide labels displayed in Confluence page of specific spaces using JavaScript.

Solution

1. Find out the space key for the spaces in interest by going to Space Tools > Overview. 
2. Navigate to Confluence Admin >> Custom HTML
3. Click Edit

4. Add the following to At the end of the HEAD:

<script type="text/javascript">
    AJS.toInit(function(){
        if (AJS.$('meta[name=confluence-space-key]').attr("content")== '<space_key>'){
          AJS.$('#labels-section').hide();
        }
    });
</script>

 Replace the <space_key> above with the actual space key obtained from step 1