Remove many unnecessary manual link resolves from library

Now that #76934 has merged, we can remove a lot of these! E.g, this is
no longer necessary:

    [`Vec<T>`]: Vec

library/std/src/error.rs

@@ -42,8 +42,6 @@ use crate::string;
 /// via [`Error::source()`]. This makes it possible for the high-level
 /// module to provide its own errors while also revealing some of the
 /// implementation for debugging via `source` chains.
-///
-/// [`Result<T, E>`]: Result
 #[stable(feature = "rust1", since = "1.0.0")]
 pub trait Error: Debug + Display {
     /// The lower-level source of this error, if any.