Prevent removing provider from the registry

Author: brichet

src/provider.ts

@@ -50,16 +50,14 @@ export class AIProviderRegistry implements IAIProviderRegistry {
    * Add a new provider.
    */
   add(provider: IAIProvider): void {
+    if (this._providers.has(provider.name)) {
+      throw new Error(
+        `A AI provider named '${provider.name}' is already registered`
+      );
+    }
     this._providers.set(provider.name, provider);
   }
 
-  /**
-   * Remove a provider.
-   */
-  remove(name: string): void {
-    this._providers.delete(name);
-  }
-
   /**
    * Get the current provider name.
    */

src/tokens.ts

@@ -57,10 +57,6 @@ export interface IAIProviderRegistry {
    * Add a new provider.
    */
   add(provider: IAIProvider): void;
-  /**
-   * Remove a provider.
-   */
-  remove(name: string): void;
   /**
    * Get the current provider name.
    */