docs: remove duplicate testing guidance

Author: chenjiahan

README.md

@@ -113,54 +113,6 @@ For example, import Rstest APIs without adding `@rstest/core` as a direct depend
 import { expect, test } from 'rstack/test';
 ```
 
-## Test projects
-
-`define.test()` accepts an Rstest configuration. For a single project, Rstack automatically applies the `define.app()` configuration, or falls back to `define.lib()`:
-
-```ts
-import { define } from 'rstack';
-
-define.app({
-  // Rsbuild configuration
-});
-
-define.test({
-  testEnvironment: 'happy-dom',
-});
-```
-
-For multiple test environments in the same app or library, use inline projects:
-
-```ts
-import { define } from 'rstack';
-import { defineInlineProject } from 'rstack/test';
-
-define.app({
-  // Shared by all inline projects
-});
-
-define.test({
-  projects: [
-    defineInlineProject({
-      name: 'node',
-      include: ['./tests/node/**/*.test.ts'],
-      testEnvironment: 'node',
-    }),
-    defineInlineProject({
-      name: 'dom',
-      include: ['./tests/dom/**/*.test.tsx'],
-      testEnvironment: 'happy-dom',
-    }),
-  ],
-});
-```
-
-Rstack applies the shared app or library adapter to every inline project without an explicit `extends`. String project entries are passed to Rstest unchanged and load their own configuration.
-
-Run all projects with `rs test`, or select one with `rs test --project dom`.
-
-See [`examples/rstest-inline-projects`](./examples/rstest-inline-projects) for a complete React SSR example.
-
 ## Credits
 
 Rstack CLI is inspired by:

examples/documentation/docs/api/_meta.json

@@ -1 +1 @@
-["index", "commands", "testing"]
+["index", "commands"]