Remove redundant comments

app_to_web.md

@@ -56,13 +56,11 @@ background requests will be made and the browser will not set
 
 If the `Attribution-Reporting-Support` header indicates OS support, the reporting origin can optionally respond to the request with a [list structured header](https://httpwg.org/specs/rfc8941.html#list) containing one or more URLs that indicates a desire to use the OS's attribution API instead of the browser's. Note that the API also allows browsers to only support OS-level attribution if they choose.
 ```http
-// Registers a source against a native OS attribution API
 Attribution-Reporting-Register-OS-Source: "https://adtech.example/register", "https://other-adtech.example/register"
 ```
 
 Trigger registrations will accept a new response header as well:
 ```http
-// Registers a trigger against a native OS attribution API
 Attribution-Reporting-Register-OS-Trigger: "https://adtech.example/register", "https://other-adtech.example/register"
 ```