Actually allow caching for the mod_tls test.

Author: notroj

.github/workflows/linux.yml

@@ -236,7 +236,6 @@ jobs:
           #     TEST_MD=1
           # -------------------------------------------------------------------------
           ### TODO: if: *condition_not_24x
-          ### TODO: fix caching here.
           - name: MOD_TLS test suite
             config: --enable-mods-shared=reallyall --with-mpm=event --enable-mpms-shared=event
             pkgs: curl python3-pytest nghttp2-client python3-cryptography python3-requests python3-multipart python3-filelock python3-websockets cargo cbindgen
@@ -248,7 +247,6 @@ jobs:
               NO_TEST_FRAMEWORK=1
               TEST_INSTALL=1
               TEST_MOD_TLS=1
-              CLEAR_CACHE=1
           - name: Configured w/reduced exports
             config: --enable-reduced-exports --enable-maintainer-mode
             env: |