Remove outdated comment and hide variants of c_void

src/liblibc/lib.rs

@@ -191,14 +191,15 @@ pub mod types {
             /// C. Use the unit type `()` or omit the return type instead.
             ///
             /// For LLVM to recognize the void pointer type and by extension
-            /// functions like malloc(), we need to have it represented as i8* in
-            /// LLVM bitcode. The enum used here ensures this and prevents misuse
-            /// of the "raw" type by only having private variants.. We need two
-            /// variants, because the compiler complains about the repr attribute
-            /// otherwise.
+            /// functions like malloc(), we need to have it represented as i8*
+            /// in LLVM bitcode. The enum used here ensures this. We need two
+            /// variants, because the compiler complains about the `repr`
+            /// attribute otherwise.
             #[repr(u8)]
             pub enum c_void {
+                #[doc(hidden)]
                 __variant1,
+                #[doc(hidden)]
                 __variant2,
             }