docs(quickstart): drop http-export removal step, depends on wasmCloud#5278

Once wasmCloud/wasmCloud#5278 lands, the http-hello-world template no
longer carries the redundant `export wasi:http/incoming-handler@0.2.2;`
line in world.wit (wstd's #[http_server] macro handles it), so users
never see the export and never have to think about removing it. Drop
the [!code --] strikethrough and the :::note explainer from the Rust
world.wit block — the persistent-storage step is now just "add two
import lines."

Also fix a stale link in the TypeScript tip box (was pointing at the
Rust example by mistake).

Signed-off-by: Eric Gregory <eric@cosmonic.com>

Author: ericgregory

docs/quickstart/develop-a-webassembly-component.mdx

@@ -178,17 +178,9 @@ world hello {
   import wasi:keyvalue/store@0.2.0-draft;
   // [!code ++]
   import wasi:keyvalue/atomics@0.2.0-draft;
-  // [!code --]
-  export wasi:http/incoming-handler@0.2.2;
 }
 ```
 
-:::note[Why drop the http export?]
-
-Once `wit_bindgen::generate!` is in your source (added below), it generates bindings for every interface declared in `world.wit`. `wstd`'s `#[http_server]` proc macro ALSO generates the `wasi:http/incoming-handler` export — if both try to define it, the component encoder fails with *"failed to find export of interface `wasi:http/incoming-handler@…` function `handle`."* Removing the export from `world.wit` leaves `wstd` solely responsible for it, which is the pattern the [`http-hello-world-persistent-storage`](https://github.com/wasmCloud/wasmCloud/tree/main/examples/http-hello-world-persistent-storage) example uses.
-
-:::
-
   </TabItem>
   <TabItem value="typescript" label="TypeScript">
 
@@ -312,7 +304,7 @@ We've made changes, so once we save, the toolchain will once again automatically
 
 :::tip[See the working version]
 
-The end-state Rust component for this section lives at [`examples/http-hello-world-persistent-storage`](https://github.com/wasmCloud/wasmCloud/tree/main/examples/http-hello-world-persistent-storage) in the main wasmCloud repo. CI builds it on every PR, so any drift between this walkthrough and what actually compiles surfaces immediately.
+You can find the end-state Rust component for this section [in the main wasmCloud repo](https://github.com/wasmCloud/wasmCloud/tree/main/examples/http-hello-world-persistent-storage).
 
 :::
 
@@ -355,7 +347,7 @@ We've made changes, so once we save, the toolchain will once again automatically
 
 :::tip[See the working version]
 
-The end-state TypeScript component for this section lives at [`examples/components/http-hello-world-hono-persistent-storage`](https://github.com/wasmCloud/typescript/tree/main/examples/components/http-hello-world-hono-persistent-storage) in the `wasmCloud/typescript` repo. CI builds it on every PR, so any drift between this walkthrough and what actually compiles surfaces immediately.
+You can find the end-state TypeScript component for this section [in the `wasmCloud/typescript` repo](https://github.com/wasmCloud/typescript/tree/main/examples/components/http-hello-world-hono-persistent-storage).
 
 :::