crashhandler repo is gone, gc for real

R1/source/vmods/vmod_crashhandler.json

-{
-    "date": "YYYY-MM-DD",
-    "desc": "Crashhandler",
-    "github": {
-        "branches": {
-            "3.0": "master"
-        },
-        "project": "libvmod-crashhandler",
-        "user": "varnish",
-        "vcc_path": "src/vmod_crashhandler.vcc"
-    },
-    "inactive": true,
-    "license": "FreeBSD",
-    "name": "crashhandler",
-    "status": "mature"
-}
\ No newline at end of file