Remove the SemanticHighlighting feature

This was a proposed feature that never made it to stable and was superceded by Semantic Tokens

See: eclipse-lsp4j/lsp4j#457

Closes gluon-lang#182

Cargo.toml

@@ -20,7 +20,6 @@ serde = { version = "1.0.34", features = ["derive"] }
 serde_json = "1.0.50"
 serde_repr = "0.1"
 url = {version = "2.0.0", features = ["serde"]}
-base64 = "0.12.0"
 
 [features]
 default = []

src/lib.rs

@@ -85,11 +85,6 @@ pub use rename::*;
 pub mod selection_range;
 pub use selection_range::*;
 
-#[cfg(feature = "proposed")]
-mod semantic_highlighting;
-#[cfg(feature = "proposed")]
-pub use semantic_highlighting::*;
-
 mod semantic_tokens;
 pub use semantic_tokens::*;
 
@@ -1359,11 +1354,6 @@ pub struct TextDocumentClientCapabilities {
     #[serde(skip_serializing_if = "Option::is_none")]
     pub linked_editing_range: Option<LinkedEditingRangeClientCapabilities>,
 
-    /// The client's semantic highlighting capability.
-    #[cfg(feature = "proposed")]
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub semantic_highlighting_capabilities: Option<SemanticHighlightingClientCapability>,
-
     /// Capabilities specific to the various call hierarchy requests.
     ///
     /// @since 3.16.0
@@ -1715,11 +1705,6 @@ pub struct ServerCapabilities {
     #[serde(skip_serializing_if = "Option::is_none")]
     pub workspace: Option<WorkspaceServerCapabilities>,
 
-    /// Semantic highlighting server capabilities.
-    #[cfg(feature = "proposed")]
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub semantic_highlighting: Option<SemanticHighlightingServerCapability>,
-
     /// Call hierarchy provider capabilities.
     #[serde(skip_serializing_if = "Option::is_none")]
     pub call_hierarchy_provider: Option<CallHierarchyServerCapability>,

src/notification.rs

@@ -64,10 +64,6 @@ macro_rules! lsp_notification {
     ("$/progress") => {
         $crate::notification::Progress
     };
-    // Requires #[cfg(feature = "proposed")]
-    ("textDocument/semanticHighlighting") => {
-        $crate::notification::SemanticHighlighting
-    };
     ("workspace/didCreateFiles") => {
         $crate::notification::DidCreateFiles
     };
@@ -257,17 +253,6 @@ impl Notification for WorkDoneProgressCancel {
     const METHOD: &'static str = "window/workDoneProgress/cancel";
 }
 
-#[cfg(feature = "proposed")]
-/// Diagnostics notification are sent from the server to the client to signal results of validation runs.
-#[derive(Debug)]
-pub enum SemanticHighlighting {}
-
-#[cfg(feature = "proposed")]
-impl Notification for SemanticHighlighting {
-    type Params = SemanticHighlightingParams;
-    const METHOD: &'static str = "textDocument/semanticHighlighting";
-}
-
 /// The did create files notification is sent from the client to the server when files were created from within the client.
 #[derive(Debug)]
 pub enum DidCreateFiles {}
@@ -341,7 +326,5 @@ mod test {
 
     #[test]
     #[cfg(feature = "proposed")]
-    fn check_proposed_macro_definitions() {
-        check_macro!("textDocument/semanticHighlighting");
-    }
+    fn check_proposed_macro_definitions() {}
 }