fix: surface rejected configuration in a floating startup diagnostic

src/lsp_config.rs

@@ -1,5 +1,4 @@
 use crate::lsp::ServerConfig;
-use serde::Deserialize;
 use serde_json::Value;
 
 pub fn resolve(value: Value) -> Result<Vec<ServerConfig>, String> {
@@ -81,12 +80,6 @@ pub fn resolve(value: Value) -> Result<Vec<ServerConfig>, String> {
     Ok(servers)
 }
 
-pub(crate) fn deserialize<'de, D: serde::Deserializer<'de>>(
-    deserializer: D,
-) -> Result<Vec<ServerConfig>, D::Error> {
-    resolve(Value::deserialize(deserializer)?).map_err(serde::de::Error::custom)
-}
-
 fn command(value: Value, language: &str) -> Result<Vec<String>, String> {
     let error = || {
         format!(