Do not set up ccache in CI jobs building docs

Building documentation for Automake-based BIND 9 versions does not
require running "make all" beforehand.  Drop ccache setup code from the
definitions of GitLab CI jobs building documentation as it is redundant.

(cherry picked from commit 59c8321ac9e812978e6594fc8ce2c3ab17030356)

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 582115a339694207cf7f8872cf77c33a3361686b..f0138a45d706acf915c84366ef4437f1d7078e51 100644 (file)
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -531,8 +531,6 @@ docs:
   <<: *release_branch_triggering_rules
   <<: *base_image
   <<: *docs_job
-  before_script:
-    - test -w "${CCACHE_DIR}" && export PATH="/usr/lib/ccache:${PATH}"
   needs:
     - job: autoreconf
       artifacts: true
@@ -544,7 +542,6 @@ docs:tarball:
   <<: *base_image
   <<: *docs_job
   before_script:
-    - test -w "${CCACHE_DIR}" && export PATH="/usr/lib/ccache:${PATH}"
     - *unpack_release_tarball
   needs:
     - job: tarball-create