BREAKING: Remove `--unstable` flag (#25522)

This commit effectively removes the --unstable flag.

It's still being parsed, but it only prints a warning that a granular
flag should be used instead and doesn't actually enable any
unstable feature.

Closes https://github.com/denoland/deno/issues/25485
Closes https://github.com/denoland/deno/issues/23237

1 files changed, 1 insertions, 5 deletions

diff --git a/runtime/ops/bootstrap.rs b/runtime/ops/bootstrap.rs
index a60544534..bbbddc61b 100644
--- a/runtime/ops/bootstrap.rs
+++ b/runtime/ops/bootstrap.rs
@@ -95,11 +95,7 @@ pub fn op_bootstrap_user_agent(state: &mut OpState) -> String {
 #[serde]
 pub fn op_bootstrap_unstable_args(state: &mut OpState) -> Vec<String> {
   let options = state.borrow::<BootstrapOptions>();
-  if options.unstable {
-    return vec!["--unstable".to_string()];
-  }
-
-  let mut flags = Vec::new();
+  let mut flags = Vec::with_capacity(options.unstable_features.len());
   for granular_flag in crate::UNSTABLE_GRANULAR_FLAGS.iter() {
     if options.unstable_features.contains(&granular_flag.id) {
       flags.push(format!("--unstable-{}", granular_flag.name));