refactor: remove circular pip installation task

The task named "Upgrade python package manager pip" installed pip with
`state: present`, which never upgrades anything, and it did so through
`ansible.builtin.pip`. That module already requires a working pip on the target,
so the task could only ever run when its own result was already satisfied.

Co-authored-by: Copilot <copilot@github.com>

tasks/main.yaml

@@ -1,10 +1,5 @@
 ---
 
-- name: Upgrade python package manager pip
-  ansible.builtin.pip:
-    name: pip
-    state: present
-
 - name: Install required python library cryptography
   ansible.builtin.pip:
     name: cryptography>=1.2.3