Do not impl provideDebugConfigurations when supplying these via package.json

microsoft/vscode#33794 (comment)

Author: rkeithhill

src/features/DebugSession.ts

@@ -30,15 +30,6 @@ export class DebugSessionFeature implements IFeature, DebugConfigurationProvider
         this.command.dispose();
     }
 
-    // DebugConfigurationProvider method
-    provideDebugConfigurations(
-        folder: WorkspaceFolder | undefined,
-        token?: CancellationToken): ProviderResult<DebugConfiguration[]> {
-
-        // Currently all debugger initialConfigurations are specified in package.json
-        return [];
-    }
-
     // DebugConfigurationProvider method
     resolveDebugConfiguration(
         folder: WorkspaceFolder | undefined,