Revert the addition of spacing between icon and label in actionButton() (#4248)

* Revert the addition of spacing between icon and label in actionButton()

* `yarn build` (GitHub Actions)

---------

Co-authored-by: cpsievert <[email protected]>

Author: cpsievert

R/input-action.R

@@ -93,10 +93,7 @@ get_action_children <- function(label, icon) {
     # minimize the chance of breaking existing code.
     tagList(
       icon,
-      tags$span(
-        class = "shiny-icon-separator",
-        class = if (length(label) > 0) "shiny-icon-spacer"
-      ),
+      tags$span(class = "shiny-icon-separator"),
       label
     )
   } else {