tests: server_accept_first(): Drop bogus exclusion

I should have removed this conditional entirely (rather than just the
Windows part) in 7881984 . The issue
was never really Windows-specific in the first place: it just didn't
become apparent until we could test the `inprocess` back-end on other
platforms after 3e9aee8 .

(Also, this should have used the "ignore" attribute, rather than
conditional compilation: there was never any reason why the test
couldn't be run on Windows, or on the `inprocess` back-end in general --
it uncovered an actual bug in the `inprocess` back-end
implementation...)

Author: antrik

src/platform/test.rs

@@ -608,7 +608,6 @@ fn receiver_set_concurrent() {
     }
 }
 
-#[cfg(not(any(feature = "force-inprocess", target_os = "android")))]
 #[test]
 fn server_accept_first() {
     let (server, name) = OsIpcOneShotServer::new().unwrap();