gnu: r-rcas: Use standard version of ghc-pandoc-citeproc.

* gnu/packages/bioinformatics.scm (r-rcas)[native-inputs]: Replace
"ghc-pandoc-citeproc-with-pandoc-1" with "ghc-pandoc-citeproc".

gnu/packages/bioinformatics.scm

@@ -8518,7 +8518,7 @@ (define-public r-rcas
      `(("r-testthat" ,r-testthat)
        ;; During vignette building knitr checks that "pandoc-citeproc"
        ;; is in the PATH.
-       ("ghc-pandoc-citeproc" ,ghc-pandoc-citeproc-with-pandoc-1)))
+       ("ghc-pandoc-citeproc" ,ghc-pandoc-citeproc)))
     (propagated-inputs
      `(("r-biocgenerics" ,r-biocgenerics)
        ("r-biomart" ,r-biomart)