remove Rnb code (moving to rmarkdown package)
remove Rnb code (moving to rmarkdown package)

jrnold/rstudio,jar1karp/rstudio,JanMarvin/rstudio,jar1karp/rstudio,jar1karp/rstudio,JanMarvin/rstudio,jrnold/rstudio,jrnold/rstudio,jar1karp/rstudio,JanMarvin/rstudio,jrnold/rstudio,JanMarvin/rstudio,jrnold/rstudio,JanMarvin/rstudio,jar1karp/rstudio,jar1karp/rstudio,jar1karp/rstudio,JanMarvin/rstudio,jar1karp/rstudio,JanMarvin/rstudio,jrnold/rstudio,jrnold/rstudio,JanMarvin/rstudio,jrnold/rstudio,jar1karp/rstudio,JanMarvin/rstudio,jrnold/rstudio