Merge pull request #475 from ishaan-arora-1/fix/drop-pandoc-citeproc-474

Drop outdated pandoc-citeproc from SystemRequirements (#474)

Author: jgabry

DESCRIPTION

@@ -26,7 +26,7 @@ Description: Plotting functions for posterior analysis, MCMC diagnostics,
 License: GPL (>= 3)
 URL: https://mc-stan.org/bayesplot/
 BugReports: https://github.com/stan-dev/bayesplot/issues/
-SystemRequirements: pandoc (>= 1.12.3), pandoc-citeproc
+SystemRequirements: pandoc (>= 1.12.3)
 Depends:
     R (>= 4.1.0)
 Imports: