Remove proposed feature from Rust package (#435)

Removing `proposed` feature from Rust package as it seems to be more
trouble than it's worth.

Author: debonte

RELEASE.md

@@ -32,6 +32,6 @@
    | Beta | Major.Minor.0-beta.X | `Major.Minor.0` matches the upcoming stable release and `X` starts at `1` and increments with each beta release |
    | Alpha | Major.Minor.0-alpha.X | `Major.Minor.0` matches the upcoming stable release and `X` starts at `1` and increments with each alpha release |
 1. `cd packages/rust/lsprotocol`
-1. Optionally use `cargo publish --all-features --dry-run` to do all of the building and testing work without actually publishing to crates.io.
+1. Optionally use `cargo publish --dry-run` to do all of the building and testing work without actually publishing to crates.io.
 1. `cargo login`
-1. `cargo publish --all-features`
+1. `cargo publish`

generator/plugins/rust/rust_commons.py

@@ -683,6 +683,4 @@ def generate_extras(
     extras = []
     if type_def.deprecated:
         extras += [f'#[deprecated(note = r#"{type_def.deprecated}"#)]']
-    if type_def.proposed:
-        extras += ['#[cfg(feature = "proposed")]']
     return extras

packages/rust/lsprotocol/Cargo.toml

@@ -10,9 +10,6 @@ documentation = "https://microsoft.github.io/language-server-protocol"
 readme = "README.md"
 keywords = ["lsp"]
 
-[features]
-proposed=[]
-
 [dependencies]
 serde = {version ="1.0.152", features = ["derive"]}
 serde_json = "1.0.93"

packages/rust/lsprotocol/README.md

@@ -6,6 +6,6 @@ This package contains Language Server Protocol types for Rust generated from the
 
 ```toml
 [dependencies]
-lsprotocol = { features = ["proposed"]}
+lsprotocol = {}
 
 ```