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, 14 deletions

diff --git a/go.mod b/go.mod
deleted file mode 100644
index cc84806..0000000
--- a/go.mod
+++ /dev/null
@@ -1,14 +0,0 @@
-module github.com/bdw/ship
-
-go 1.21
-
-require (
-        github.com/spf13/cobra v1.10.2
-        golang.org/x/crypto v0.31.0
-)
-
-require (
-        github.com/inconshreveable/mousetrap v1.1.0 // indirect
-        github.com/spf13/pflag v1.0.9 // indirect
-        golang.org/x/sys v0.28.0 // indirect
-)