ci: install Asciidoctor in 'ci/install-dependencies.sh'

diff --git a/ci/test-documentation.sh b/ci/test-documentation.sh
index be3b7d376ac47391be71a3822a320e327f7a3a2d..8f91f48c8120633c6eede991d867aab34cc0bb29 100755 (executable)
--- a/ci/test-documentation.sh
+++ b/ci/test-documentation.sh
@@ -5,9 +5,6 @@
 
 . ${0%/*}/lib.sh
 
-test -n "$ALREADY_HAVE_ASCIIDOCTOR" ||
-gem install asciidoctor
-
 make check-builtins
 make check-docs