Rollup merge of #105975 - jeremystucki:rustc-remove-needless-lifetimes, r=eholk

rustc: Remove needless lifetimes

compiler/rustc_error_messages/src/lib.rs

@@ -549,9 +549,7 @@ fn icu_locale_from_unic_langid(lang: LanguageIdentifier) -> Option<icu_locid::Lo
     icu_locid::Locale::try_from_bytes(lang.to_string().as_bytes()).ok()
 }
 
-pub fn fluent_value_from_str_list_sep_by_and<'source>(
-    l: Vec<Cow<'source, str>>,
-) -> FluentValue<'source> {
+pub fn fluent_value_from_str_list_sep_by_and(l: Vec<Cow<'_, str>>) -> FluentValue<'_> {
     // Fluent requires 'static value here for its AnyEq usages.
     #[derive(Clone, PartialEq, Debug)]
     struct FluentStrListSepByAnd(Vec<String>);