Drop stale depguard exception for cmd/apps/init.go (#5328)

`cmd/apps/init.go` no longer imports
`github.com/databricks/cli/experimental`, so the path-scoped depguard
exception in `.golangci.yaml` (with its "TODO: remove" comment) is dead.
Removes 4 lines; no functional change.

Author: pietern

.golangci.yaml

@@ -179,10 +179,6 @@ linters:
         path: "_test\\.go$"
         linters:
           - forbidigo
-      # TODO: remove these exceptions by moving the dependency out of experimental/.
-      - path: cmd/apps/init.go
-        linters:
-          - depguard
 issues:
   max-issues-per-linter: 1000
   max-same-issues: 1000