Remove vault file for removed patchwork role

Fixes: 24e73359 ("Decommission patchwork.archlinux.org and replace it with a static copy[1]")

group_vars/all/vault_patchwork.yml

-$ANSIBLE_VAULT;1.1;AES256
-39303439613730336136303364333334333466353263613231353766623238303931636437343338
-3536653066346362333466363738646135633634623037300a313236653834666335366431303534
-33376331396563383734656563383662643361613233613862396466356539323434386633346133
-3561323461616136650a666430656130313337303063346664643336633539333663323261323230
-32393730356232353037356438343334396563313132343739383861333063396235653562316131
-34353533383361643665646430636535393031326663313933393234326163313131653034316232
-35383035656137316461306362626232616163663661646262313932303665356632386232643234
-63333365303865316630363432336532666233373635653730373265353334666134346531643565
-66366365303464623665363961633463343331323339636439333231363765646239393238363334
-36343035303035613434333161646130383662626138643239646665363334313161303738356164
-30663163643636643566396339656432366163616235653438343763323731613436303864613564
-32376133623635613234626630303165386135363234303239633830333438376333363766313462
-30353333353631653262353334313239383939653639623336323962616265333466