refactor: Remove unnecessary `AsAny` trait

crates/hir-def/src/macro_expansion_tests/mod.rs

diff --git a/crates/hir-def/src/macro_expansion_tests/mod.rs b/crates/hir-def/src/macro_expansion_tests/mod.rs
index fcb4684..dc4334e 100644
--- a/crates/hir-def/src/macro_expansion_tests/mod.rs
+++ b/crates/hir-def/src/macro_expansion_tests/mod.rs
@@ -380,8 +380,4 @@
             panic!("got invalid macro input: {:?}", parse.errors());
         }
     }
-
-    fn eq_dyn(&self, other: &dyn ProcMacroExpander) -> bool {
-        other.as_any().type_id() == std::any::TypeId::of::<Self>()
-    }
 }

crates/hir-expand/src/proc_macro.rs

diff --git a/crates/hir-expand/src/proc_macro.rs b/crates/hir-expand/src/proc_macro.rs
index 8a1a33d..1cd975b 100644
--- a/crates/hir-expand/src/proc_macro.rs
+++ b/crates/hir-expand/src/proc_macro.rs
@@ -19,18 +19,8 @@
     Attr,
 }
 
-pub trait AsAny: Any {
-    fn as_any(&self) -> &dyn Any;
-}
-
-impl<T: Any> AsAny for T {
-    fn as_any(&self) -> &dyn Any {
-        self
-    }
-}
-
 /// A proc-macro expander implementation.
-pub trait ProcMacroExpander: fmt::Debug + Send + Sync + RefUnwindSafe + AsAny {
+pub trait ProcMacroExpander: fmt::Debug + Send + Sync + RefUnwindSafe + Any {
     /// Run the expander with the given input subtree, optional attribute input subtree (for
     /// [`ProcMacroKind::Attr`]), environment variables, and span information.
     fn expand(
@@ -44,7 +34,9 @@
         current_dir: String,
     ) -> Result<tt::TopSubtree, ProcMacroExpansionError>;
 
-    fn eq_dyn(&self, other: &dyn ProcMacroExpander) -> bool;
+    fn eq_dyn(&self, other: &dyn ProcMacroExpander) -> bool {
+        other.type_id() == self.type_id()
+    }
 }
 
 impl PartialEq for dyn ProcMacroExpander {

crates/load-cargo/src/lib.rs

diff --git a/crates/load-cargo/src/lib.rs b/crates/load-cargo/src/lib.rs
index 2686a75..30e2d54 100644
--- a/crates/load-cargo/src/lib.rs
+++ b/crates/load-cargo/src/lib.rs
@@ -512,10 +512,6 @@
             Err(err) => Err(ProcMacroExpansionError::System(err.to_string())),
         }
     }
-
-    fn eq_dyn(&self, other: &dyn ProcMacroExpander) -> bool {
-        other.as_any().downcast_ref::<Self>().is_some_and(|other| self == other)
-    }
 }
 
 #[cfg(test)]

crates/test-fixture/src/lib.rs

diff --git a/crates/test-fixture/src/lib.rs b/crates/test-fixture/src/lib.rs
index f6ca5ab..96e1301 100644
--- a/crates/test-fixture/src/lib.rs
+++ b/crates/test-fixture/src/lib.rs
@@ -662,10 +662,6 @@
     ) -> Result<TopSubtree, ProcMacroExpansionError> {
         Ok(subtree.clone())
     }
-
-    fn eq_dyn(&self, other: &dyn ProcMacroExpander) -> bool {
-        other.as_any().type_id() == std::any::TypeId::of::<Self>()
-    }
 }
 
 // Expands to a macro_rules! macro, for issue #18089.
@@ -697,10 +693,6 @@
             #subtree
         })
     }
-
-    fn eq_dyn(&self, other: &dyn ProcMacroExpander) -> bool {
-        other.as_any().type_id() == std::any::TypeId::of::<Self>()
-    }
 }
 
 // Pastes the attribute input as its output
@@ -721,10 +713,6 @@
             .cloned()
             .ok_or_else(|| ProcMacroExpansionError::Panic("Expected attribute input".into()))
     }
-
-    fn eq_dyn(&self, other: &dyn ProcMacroExpander) -> bool {
-        other.as_any().type_id() == std::any::TypeId::of::<Self>()
-    }
 }
 
 #[derive(Debug)]
@@ -756,10 +744,6 @@
         top_subtree_delimiter_mut.close = def_site;
         Ok(result)
     }
-
-    fn eq_dyn(&self, other: &dyn ProcMacroExpander) -> bool {
-        other.as_any().type_id() == std::any::TypeId::of::<Self>()
-    }
 }
 
 #[derive(Debug)]
@@ -791,10 +775,6 @@
         traverse(&mut builder, input.iter());
         Ok(builder.build())
     }
-
-    fn eq_dyn(&self, other: &dyn ProcMacroExpander) -> bool {
-        other.as_any().type_id() == std::any::TypeId::of::<Self>()
-    }
 }
 
 // Replaces every literal with an empty string literal and every identifier with its first letter,
@@ -835,10 +815,6 @@
             }
         }
     }
-
-    fn eq_dyn(&self, other: &dyn ProcMacroExpander) -> bool {
-        other.as_any().type_id() == std::any::TypeId::of::<Self>()
-    }
 }
 
 // Reads ident type within string quotes, for issue #17479.
@@ -864,10 +840,6 @@
             #symbol()
         })
     }
-
-    fn eq_dyn(&self, other: &dyn ProcMacroExpander) -> bool {
-        other.as_any().type_id() == std::any::TypeId::of::<Self>()
-    }
 }
 
 // Reads ident type within string quotes, for issue #17479.
@@ -919,10 +891,6 @@
             }
         })
     }
-
-    fn eq_dyn(&self, other: &dyn ProcMacroExpander) -> bool {
-        other.as_any().type_id() == std::any::TypeId::of::<Self>()
-    }
 }
 
 // Reads ident type within string quotes, for issue #17479.
@@ -950,8 +918,4 @@
         }
         Ok(subtree.clone())
     }
-
-    fn eq_dyn(&self, other: &dyn ProcMacroExpander) -> bool {
-        other.as_any().type_id() == std::any::TypeId::of::<Self>()
-    }
 }