Rollup merge of rust-lang#98856 - GuillaumeGomez:rustdoc-test-rm-fixme, r=Dylan-DPC

Remove FIXME from rustdoc intra-doc test

Removed the FIXME.

For the `extern crate`, even if `pub` exported, its documentation wasn't rendered so there is no point in keeping it.

r? ``@notriddle``

Author: Dylan-DPC

src/test/rustdoc/intra-doc/pub-use.rs

@@ -5,21 +5,11 @@
 extern crate inner;
 
 /// [mod@std::env] [g]
-
-// FIXME: This can't be tested because rustdoc doesn't show documentation on pub re-exports.
-// Until then, comment out the `htmldocck` test.
-// This test still does something; namely check that no incorrect errors are emitted when
-// documenting the re-export.
-
 // @has outer/index.html
-// @ has - '//a[@href="{{channel}}/std/env/fn.var.html"]' "std::env"
-// @ has - '//a[@href="fn.f.html"]' "g"
+// @has - '//a[@href="{{channel}}/std/env/index.html"]' "std::env"
+// @has - '//a[@href="fn.f.html"]' "g"
 pub use f as g;
 
-// FIXME: same as above
-/// [std::env]
-extern crate self as _;
-
 // Make sure the documentation is actually correct by documenting an inlined re-export
 /// [mod@std::env]
 // @has outer/fn.f.html