remove knitr, markdown, pinp from Suggests

Author: eddelbuettel

ChangeLog

@@ -1,3 +1,8 @@
+2019-12-01  Dirk Eddelbuettel  <[email protected]>
+
+	* DESCRIPTION (Suggests): Remove knitr, rmarkdown, pinp
+	* DESCRIPTION (VignetteBuilder): Remove knitr
+
 2019-11-26  Dirk Eddelbuettel  <[email protected]>
 
 	* inst/tinytest/test_embedded_r.R: Use sink to suppress noisy output,

DESCRIPTION

@@ -16,8 +16,7 @@ Description: The 'Rcpp' package provides R functions as well as C++ classes whic
  <doi:10.1080/00031305.2017.1375990>); see 'citation("Rcpp")' for details.
 Depends: R (>= 3.0.0)
 Imports: methods, utils
-Suggests: tinytest, inline, rbenchmark, knitr, rmarkdown, pinp, pkgKitten (>= 0.1.2)
-VignetteBuilder: knitr
+Suggests: tinytest, inline, rbenchmark, pkgKitten (>= 0.1.2)
 URL: http://www.rcpp.org, http://dirk.eddelbuettel.com/code/rcpp.html, https://github.com/RcppCore/Rcpp
 License: GPL (>= 2)
 BugReports: https://github.com/RcppCore/Rcpp/issues