Remove .iter() calling suggestion when Iterator isn't implemented

src/libcore/iter/iterator.rs

@@ -34,7 +34,7 @@ fn _assert_is_object_safe(_: &Iterator<Item=()>) {}
         _Self="&str",
         label="`{Self}` is not an iterator; try calling `.chars()` or `.bytes()`"
     ),
-    label="`{Self}` is not an iterator; maybe try calling `.iter()` or a similar method"
+    label="`{Self}` is not an iterator"
 )]
 #[doc(spotlight)]
 pub trait Iterator {

src/test/ui/feature-gate-trivial_bounds.stderr

@@ -81,7 +81,7 @@ error[E0277]: the trait bound `i32: std::iter::Iterator` is not satisfied
 LL | / fn use_for() where i32: Iterator { //~ ERROR
 LL | |     for _ in 2i32 {}
 LL | | }
-   | |_^ `i32` is not an iterator; maybe try calling `.iter()` or a similar method
+   | |_^ `i32` is not an iterator
    |
    = help: the trait `std::iter::Iterator` is not implemented for `i32`
    = help: see issue #48214

src/test/ui/issue-50480.stderr

@@ -8,7 +8,7 @@ error[E0277]: the trait bound `i32: std::iter::Iterator` is not satisfied
   --> $DIR/issue-50480.rs:13:24
    |
 LL | struct Foo(NotDefined, <i32 as Iterator>::Item, Vec<i32>, String);
-   |                        ^^^^^^^^^^^^^^^^^^^^^^^ `i32` is not an iterator; maybe try calling `.iter()` or a similar method
+   |                        ^^^^^^^^^^^^^^^^^^^^^^^ `i32` is not an iterator
    |
    = help: the trait `std::iter::Iterator` is not implemented for `i32`
 

src/test/ui/suggest-remove-refs-1.stderr

@@ -4,7 +4,7 @@ error[E0277]: the trait bound `&std::iter::Enumerate<std::slice::Iter<'_, {integ
 LL |     for (i, n) in &v.iter().enumerate() {
    |                   -^^^^^^^^^^^^^^^^^^^^
    |                   |
-   |                   `&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>` is not an iterator; maybe try calling `.iter()` or a similar method
+   |                   `&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>` is not an iterator
    |                   help: consider removing 1 leading `&`-references
    |
    = help: the trait `std::iter::Iterator` is not implemented for `&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>`

src/test/ui/suggest-remove-refs-2.stderr

@@ -4,7 +4,7 @@ error[E0277]: the trait bound `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {i
 LL |     for (i, n) in & & & & &v.iter().enumerate() {
    |                   ---------^^^^^^^^^^^^^^^^^^^^
    |                   |
-   |                   `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>` is not an iterator; maybe try calling `.iter()` or a similar method
+   |                   `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>` is not an iterator
    |                   help: consider removing 5 leading `&`-references
    |
    = help: the trait `std::iter::Iterator` is not implemented for `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>`

src/test/ui/suggest-remove-refs-3.stderr

@@ -9,7 +9,7 @@ LL | ||         & &v
    | ||___________- help: consider removing 5 leading `&`-references
 LL | |          .iter()
 LL | |          .enumerate() {
-   | |_____________________^ `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>` is not an iterator; maybe try calling `.iter()` or a similar method
+   | |_____________________^ `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>` is not an iterator
    |
    = help: the trait `std::iter::Iterator` is not implemented for `&&&&&std::iter::Enumerate<std::slice::Iter<'_, {integer}>>`
    = note: required by `std::iter::IntoIterator::into_iter`