docs: remove outdated http/2 advice

docs/src/content/overview-features.md

@@ -147,9 +147,6 @@ The `map_remote` option lets you specify an arbitrary number of patterns that
 define replacements within HTTP request URLs before they are sent to a server.
 The substituted URL is fetched instead of the original resource
 and the corresponding HTTP response is returned transparently to the client.
-Note that if the original destination uses HTTP2, the substituted destination
-needs to support HTTP2 as well, otherwise the substituted request may fail.
-As a workaround you can start mitmproxy with the `--no-http2` flag to disable HTTP2.
 `map_remote` patterns look like this:
 
 ```
@@ -169,8 +166,6 @@ The _separator_ is arbitrary, and is defined by the first character (`|` in the
 #### Examples
 
 Map all requests ending with `.jpg` to `https://placedog.net/640/480?random`.
-Note that this might fail if the original HTTP request destination uses HTTP2 but the replaced
-destination does not support HTTP2.
 
 ```
 |.*\.jpg$|https://placedog.net/640/480?random