fix: remove supportsDefinitionsForAdditionalPaths function

This check is not necessary

lib/auto-languageclient.ts

@@ -705,7 +705,11 @@ export default class AutoLanguageClient {
       point
     )
 
-    if (query !== null && this.supportsDefinitionsForAdditionalPaths && server.additionalPaths !== undefined) {
+    if (query !== null && server.additionalPaths !== undefined) {
+      /*
+       * Indicates that the language server can support LSP functionality for out of project files indicated by
+       * `textDocument/definition` responses.
+       */
       for (const def of query.definitions) {
         considerAdditionalPath(server as ActiveServer & { additionalPaths: Set<string> }, path.dirname(def.path))
       }
@@ -998,14 +1002,6 @@ export default class AutoLanguageClient {
       .forEach((line) => this.logger.warn(`stderr ${line}`))
   }
 
-  /**
-   * Indicates that the language server can support LSP functionality for out of project files indicated by
-   * `textDocument/definition` responses. Set it to `true` if the server supports this feature.
-   *
-   * @default `false`
-   */
-  protected supportsDefinitionsForAdditionalPaths: boolean = false
-
   private getServerAdapter<T extends keyof ServerAdapters>(
     server: ActiveServer,
     adapter: T