chore(ci): issue2551368 cleanup new gpg use

Remove the old if statement that selected how gpg was installed
now that operation under 3.7 and 3.8 work in testing.

Author: rouilj

.github/workflows/ci-test.yml

@@ -240,13 +240,9 @@ jobs:
           # used for newer Python versions. Temporarily use the
           # testing index, which contains a newer version of the
           # bindings on 24.04 or released version for other OS
-          # versions. See issue2551368
-          if true || grep 24.04 /etc/os-release > /dev/null; then \
-            pip install --index-url https://test.pypi.org/simple/ \
-                --extra-index-url https://pypi.org/simple --pre gpg; \
-          else \
-            pip install gpg; \
-          fi
+          # versions. See issue2551368. 'pip install gpg' should work.
+          pip install --index-url https://test.pypi.org/simple/ \
+                --extra-index-url https://pypi.org/simple --pre gpg;
 
       - name: Install aux packages that need versions differences
         # if zstd fails install, keep going with test, don't abort