MINOR: [R] Update DESCRIPTION (apache#36354)

remove (soon to be) obsolete email ... I think it's fine just removing the email rather than replace it. 

Authored-by: Romain François <romain@rstudio.com>
Signed-off-by: Nic Crane <thisisnic@gmail.com>

r/DESCRIPTION

@@ -6,7 +6,7 @@ Authors@R: c(
     person("Ian", "Cook", email = "ianmcook@gmail.com", role = c("aut")),
     person("Nic", "Crane", email = "thisisnic@gmail.com", role = c("aut", "cre")),
     person("Dewey", "Dunnington", role = c("aut"), email = "dewey@fishandwhistle.net", comment = c(ORCID = "0000-0002-9415-4582")),
-    person("Romain", "Fran\u00e7ois", email = "romain@rstudio.com", role = c("aut"), comment = c(ORCID = "0000-0002-2444-4226")),
+    person("Romain", "Fran\u00e7ois", role = c("aut"), comment = c(ORCID = "0000-0002-2444-4226")),
     person("Jonathan", "Keane", email = "jkeane@gmail.com", role = c("aut")),
     person("Drago\u0219", "Moldovan-Gr\u00fcnfeld", email = "dragos.mold@gmail.com", role = c("aut")),
     person("Jeroen", "Ooms", email = "jeroen@berkeley.edu", role = c("aut")),