Remove GPG public key for sign-artifacts role

This is actually a noop for gpg, since the private key also contains
the public.

Change-Id: I60d4ebf0f3343911986a4e6c46a806539cda701b
Signed-off-by: Paul Belanger <pabelanger@redhat.com>

roles/sign-artifacts/README.rst

@@ -4,13 +4,9 @@ Sign artifacts
 
 .. zuul:rolevar:: gpg_key
 
-   Complex argument which contains the GPG public and secret keyrings
+   Complex argument which contains the GPG private key for signing
-   for signing the artifacts. It is expected that this argument comes
+   the artifacts. It is expected that this argument comes from a
-   from a `Secret`.
+   `Secret`.
-
-  .. zuul:rolevar:: public
-
-     The ascii-armored contents of the GPG public key.
 
   .. zuul:rolevar:: private
 

roles/sign-artifacts/tasks/main.yaml

@@ -22,25 +22,6 @@
     path: "{{ gpg_private_key_tmp.path }}"
     state: absent
 
-- name: Create GPG public key tempfile
-  tempfile:
-    state: file
-  register: gpg_public_key_tmp
-
-- name: Create GPG public key
-  copy:
-    content: "{{ gpg_key.public }}"
-    dest: "{{ gpg_public_key_tmp.path }}"
-    mode: 0400
-
-- name: Import GPG public key
-  command: "gpg --homedir {{ gnupg_tmpdir.path }} --import {{ gpg_public_key_tmp.path }}"
-
-- name: Delete GPG public key
-  file:
-    path: "{{ gpg_public_key_tmp.path }}"
-    state: absent
-
 - name: Find files to sign
   find:
     paths: "{{ gpg_sign_path }}"