It looks like you are using the ‘Bearded’ theme, which – while a free theme – is not part of the wordpress repository.
I am installed firebug but unable to resolve, please provide some code snippet
While I could ‘give’ you teh code, Ichoose to guide you to the solution so you will learn how to solve your problems in the future.
did you try using the code examiner? What issue did you have?
Once you run FireBug, use the second icon from the left – it looks like a rectangle with an arrow pointed in it – and click on teh element you are interested in. This should show you the HTML it uses and on the right side, the CSS applied to it.
If you look at that element you should see a class assigned to it and to make the CSS selector more specific, you should look for something in a parent element that is unique (hint: like a post id).
With all that you should be able to construct a CSS selector and rule to hide the element.