test/unit/sync: Stop stubbing Sync#fileChanged and #folderChanged
test/unit/sync: Stop stubbing Sync#fileChanged and #folderChanged

cozy-labs/cozy-desktop,cozy-labs/cozy-desktop,nono/cozy-desktop,cozy-labs/cozy-desktop,nono/cozy-desktop,nono/cozy-desktop,nono/cozy-desktop,cozy-labs/cozy-desktop