remove post meta

I wanted to remove the post meta data.

.post-meta {     /* this will hide div with class div_class_name */
  display:none;
}

I have added that in line 2554(style.css), but it doesn’t function (it gets deleted in live version. If I add it in google chrome it does function, but in style.css it doesn’t.

Is there a way to remove the post meta data completely.

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