Remove Go implementation — ship is skills-only nowmain

The skills/ directory fully replaces the old Go CLI. Drop all Go
source, build files, planning docs, and the stale SECURITY.md
(which described the old git-user push-deploy model that no longer
exists). Trim .gitignore to match the new tree.

1 files changed, 0 insertions, 10 deletions

diff --git a/cmd/ship/main.go b/cmd/ship/main.go
deleted file mode 100644
index 17516fb..0000000
--- a/cmd/ship/main.go
+++ /dev/null
@@ -1,10 +0,0 @@
-package main
-
-import "os"
-
-func main() {
-        initV2()
-        if err := rootV2Cmd.Execute(); err != nil {
-                os.Exit(1)
-        }
-}