☕ Remove update related tasks and CI

We now can use deno's built-in functionality to update dependencies.

Author: lambdalisue

.github/workflows/update.yml

@@ -21,8 +21,6 @@
     "check": "deno check **/*.ts",
     "check:doc": "deno test --doc --no-run",
     "test": "deno test -A --parallel --shuffle",
-    "update": "deno run --allow-env --allow-read --allow-write=. --allow-run=git,deno --allow-net=jsr.io,registry.npmjs.org jsr:@molt/cli ./*.ts",
-    "update:commit": "deno task -q update --commit --prefix :package: --pre-commit=fmt,lint",
     "apply:supported-versions": "deno run --allow-env --allow-net --allow-read --allow-write .scripts/apply-supported-versions.ts"
   },
   "imports": {