ci: bugfix: Don't restore emoji cache on prod.
ci: bugfix: Don't restore emoji cache on prod.

The emoji cache files are not available on production jobs. Also,
copying the files, creating and restoring caches doesn't add
much optimization over just rebuilding the caches here.

synicalsyntax/zulip,hackerkid/zulip,kou/zulip,punchagan/zulip,showell/zulip,brainwane/zulip,eeshangarg/zulip,eeshangarg/zulip,zulip/zulip,punchagan/zulip,brainwane/zulip,zulip/zulip,punchagan/zulip,hackerkid/zulip,andersk/zulip,kou/zulip,timabbott/zulip,hackerkid/zulip,andersk/zulip,brainwane/zulip,shubhamdhama/zulip,timabbott/zulip,shubhamdhama/zulip,synicalsyntax/zulip,synicalsyntax/zulip,kou/zulip,synicalsyntax/zulip,andersk/zulip,showell/zulip,andersk/zulip,timabbott/zulip,synicalsyntax/zulip,hackerkid/zulip,rht/zulip,shubhamdhama/zulip,rht/zulip,punchagan/zulip,showell/zulip,synicalsyntax/zulip,showell/zulip,shubhamdhama/zulip,zulip/zulip,zulip/zulip,kou/zulip,shubhamdhama/zulip,eeshangarg/zulip,rht/zulip,rht/zulip,punchagan/zulip,eeshangarg/zulip,hackerkid/zulip,andersk/zulip,rht/zulip,showell/zulip,shubhamdhama/zulip,kou/zulip,timabbott/zulip,hackerkid/zulip,synicalsyntax/zulip,timabbott/zulip,kou/zulip,showell/zulip,rht/zulip,shubhamdhama/zulip,brainwane/zulip,brainwane/zulip,eeshangarg/zulip,eeshangarg/zulip,punchagan/zulip,zulip/zulip,timabbott/zulip,eeshangarg/zulip,andersk/zulip,zulip/zulip,brainwane/zulip,hackerkid/zulip,andersk/zulip,punchagan/zulip,timabbott/zulip,showell/zulip,brainwane/zulip,zulip/zulip,kou/zulip,rht/zulip