Update to new API, allowing to remove check_doc_cfg.rs file from librustdoc

tests/rustdoc-ui/doc-cfg-2.rs

@@ -12,5 +12,7 @@
 // Shouldn't lint
 #[doc(auto_cfg(hide(windows)))]
 #[doc(auto_cfg(hide(feature = "windows")))]
+//~^ WARN unexpected `cfg` condition name: `feature`
 #[doc(auto_cfg(hide(foo)))]
+//~^ WARN unexpected `cfg` condition name: `foo`
 pub fn foo() {}

tests/rustdoc-ui/doc-cfg-2.stderr

@@ -56,5 +56,23 @@ error: expected boolean for `#[doc(auto_cfg = ...)]`
 LL | #[doc(auto_cfg = "a")]
    |                  ^^^
 
-error: aborting due to 6 previous errors; 2 warnings emitted
+warning: unexpected `cfg` condition name: `feature`
+  --> $DIR/doc-cfg-2.rs:14:21
+   |
+LL | #[doc(auto_cfg(hide(feature = "windows")))]
+   |                     ^^^^^^^^^^^^^^^^^^^
+   |
+   = help: to expect this configuration use `--check-cfg=cfg(feature, values("windows"))`
+   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
+
+warning: unexpected `cfg` condition name: `foo`
+  --> $DIR/doc-cfg-2.rs:16:21
+   |
+LL | #[doc(auto_cfg(hide(foo)))]
+   |                     ^^^
+   |
+   = help: to expect this configuration use `--check-cfg=cfg(foo)`
+   = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
+
+error: aborting due to 6 previous errors; 4 warnings emitted
 

tests/rustdoc-ui/doc-cfg-check-cfg.cfg_empty.stderr

@@ -1,8 +1,8 @@
 warning: unexpected `cfg` condition name: `foo`
-  --> $DIR/doc-cfg-check-cfg.rs:12:12
+  --> $DIR/doc-cfg-check-cfg.rs:15:11
    |
-LL | #![doc(cfg(foo))]
-   |            ^^^
+LL | #[doc(cfg(foo))]
+   |           ^^^
    |
    = help: to expect this configuration use `--check-cfg=cfg(foo)`
    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
@@ -18,10 +18,10 @@ LL | #[doc(cfg(foo))]
    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration
 
 warning: unexpected `cfg` condition name: `foo`
-  --> $DIR/doc-cfg-check-cfg.rs:15:11
+  --> $DIR/doc-cfg-check-cfg.rs:12:12
    |
-LL | #[doc(cfg(foo))]
-   |           ^^^
+LL | #![doc(cfg(foo))]
+   |            ^^^
    |
    = help: to expect this configuration use `--check-cfg=cfg(foo)`
    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg.html> for more information about checking conditional configuration

tests/rustdoc-ui/issues/issue-91713.stdout

@@ -1,5 +1,4 @@
 Available passes for running rustdoc:
-       check-doc-cfg - checks `#[doc(cfg(...))]` for stability feature and unexpected cfgs
 check_doc_test_visibility - run various visibility-related lints on doctests
    propagate-doc-cfg - propagates `#[doc(cfg(...))]` to child items
 strip-aliased-non-local - strips all non-local private aliased items from the output
@@ -15,7 +14,6 @@ calculate-doc-coverage - counts the number of items with and without documentati
 Default passes for rustdoc:
  collect-trait-impls
 check_doc_test_visibility
-       check-doc-cfg
 strip-aliased-non-local
    propagate-doc-cfg
         strip-hidden  (when not --document-hidden-items)