Revert "Pinning golang version for doc builds to 1.21.7"

This reverts commit cdf5ba8.

ci/playbooks/pre-doc.yml

@@ -23,22 +23,5 @@
         name:
           - make
           - python3
+          - golang
           - ruby
-
-    - name: Download golang version 1.21.7
-      ansible.builtin.get_url:
-        source: https://go.dev/dl/go1.21.7.linux-amd64.tar.gz
-        dest: go1.21.7.linux-amd64.tar.gz
-        checksum: ffeabdfe10a7e84197ac7d28fda7484d0f855a92
-
-    - name: Install golang
-      become: true
-      ansible.builtin.unarchive:
-        src: go1.27.linux-amd64.tar.gz
-        dest: ~/bin
-        include:
-          - bin/go
-          - bin/gofmt
-        extra_opts:
-          - --strip-components=2
-        creates: ~/bin/go