Update cran comments

Author: jennybc

cran-comments.md

@@ -1,14 +1,10 @@
-## Test environments
-
-* win-builder: R devel
-* r-hub: Windows Server 2008 R2 SP1, R devel
-* r-hub: Fedora Linux + clang + gfortran, R devel
-* r-hub: Ubuntu Linux 16.04 LTS + GCC, R 4.0
-* github actions: Windows Server 2019, R 4.0
-* github actions: Ubuntu 16.04, R 4.0 through 3.3
-* github actions: macOS 10.15, R devel and 4.0
-* local macOS 10.14 Mojave, R 3.6
-
 ## R CMD check results
 
 0 errors | 0 warnings | 0 notes
+
+## revdepcheck results
+
+We checked 2 reverse dependencies, comparing R CMD check results across CRAN and dev versions of this package.
+
+ * We saw 0 new problems
+ * We failed to check 0 packages