misc: delete main.workflow

.github/main.workflow

@@ -1,21 +0,0 @@
-workflow "Docker build" {
-  on = "push"
-  resolves = ["Build Docker Image"]
-}
-
-action "Filter branch dev" {
-  uses = "actions/bin/filter@c6471707d308175c57dfe91963406ef205837dbd"
-  args = "branch master"
-}
-
-action "Docker Registry" {
-  uses = "actions/docker/login@c08a5fc9e0286844156fefff2c141072048141f6"
-  needs = ["Filter branch dev"]
-  secrets = ["DOCKER_USERNAME", "DOCKER_PASSWORD"]
-}
-
-action "Build Docker Image" {
-  uses = "actions/docker/cli@c08a5fc9e0286844156fefff2c141072048141f6"
-  needs = ["Docker Registry"]
-  runs = "docker build -f ./dev/build/Dockerfile -t requarks/wiki:dev ."
-}