title: How to remove warning messages in R Markdown document?
body: <p>I have an R Markdown document, which takes a really long time to knit because of heavy computations. Mistakenly there are some code chunks where I forgot to put <code>warnings=False</code> before knitting the document. Is their any way to remove those warning messages, without knitting the document again??
  Is there any way to remove warnings from the Markdown document and rebuild an html file from the markdown. I don't want to execute the code again.
  Need the similar changes in the markdown document as well.</p>