Remove Iterator #[rustc_on_unimplemented]s that no longer apply.

library/core/src/iter/traits/iterator.rs

@@ -25,40 +25,6 @@ fn _assert_is_object_safe(_: &dyn Iterator<Item = ()>) {}
 /// [impl]: crate::iter#implementing-iterator
 #[stable(feature = "rust1", since = "1.0.0")]
 #[rustc_on_unimplemented(
-    on(
-        _Self = "[std::ops::Range<Idx>; 1]",
-        label = "if you meant to iterate between two values, remove the square brackets",
-        note = "`[start..end]` is an array of one `Range`; you might have meant to have a `Range` \
-                without the brackets: `start..end`"
-    ),
-    on(
-        _Self = "[std::ops::RangeFrom<Idx>; 1]",
-        label = "if you meant to iterate from a value onwards, remove the square brackets",
-        note = "`[start..]` is an array of one `RangeFrom`; you might have meant to have a \
-              `RangeFrom` without the brackets: `start..`, keeping in mind that iterating over an \
-              unbounded iterator will run forever unless you `break` or `return` from within the \
-              loop"
-    ),
-    on(
-        _Self = "[std::ops::RangeTo<Idx>; 1]",
-        label = "if you meant to iterate until a value, remove the square brackets and add a \
-                 starting value",
-        note = "`[..end]` is an array of one `RangeTo`; you might have meant to have a bounded \
-                `Range` without the brackets: `0..end`"
-    ),
-    on(
-        _Self = "[std::ops::RangeInclusive<Idx>; 1]",
-        label = "if you meant to iterate between two values, remove the square brackets",
-        note = "`[start..=end]` is an array of one `RangeInclusive`; you might have meant to have a \
-              `RangeInclusive` without the brackets: `start..=end`"
-    ),
-    on(
-        _Self = "[std::ops::RangeToInclusive<Idx>; 1]",
-        label = "if you meant to iterate until a value (including it), remove the square brackets \
-                 and add a starting value",
-        note = "`[..=end]` is an array of one `RangeToInclusive`; you might have meant to have a \
-                bounded `RangeInclusive` without the brackets: `0..=end`"
-    ),
     on(
         _Self = "std::ops::RangeTo<Idx>",
         label = "if you meant to iterate until a value, add a starting value",