lint: update clippy annotations

Some annotations are no longer needed with more recent clippy (1.85+),
so let's remove them.

Closes #11964

build.rs

@@ -132,7 +132,6 @@ fn detect_bsd(_: &Target) -> bool {
     if !target.chars().all(|c| c.is_ascii_lowercase()) {
         target = target.to_ascii_lowercase();
     }
-    #[allow(clippy::let_and_return)] // for old clippy
     let is_bsd = target.ends_with("bsd") || target.ends_with("dragonfly");
     #[cfg(any(
         target_os = "dragonfly",

crates/printf/src/fmt_fp/mod.rs

@@ -279,7 +279,6 @@ fn format_a(mut y: f64, params: FormatParams<'_, impl Write>) -> Result<usize, E
 
     // Compute the number of hex digits in the mantissa after the decimal.
     // -1 for leading 1 bit (we are to the range [1, 2)), then divide by 4, rounding up.
-    #[allow(unknown_lints)] // for old clippy
     #[allow(clippy::manual_div_ceil)]
     const MANTISSA_HEX_DIGITS: usize = (MANTISSA_BITS - 1 + 3) / 4;
     if had_prec && prec < MANTISSA_HEX_DIGITS {

src/ast.rs

@@ -251,8 +251,6 @@ pub fn is_same_node(lhs: &dyn Node, rhs: &dyn Node) -> bool {
     }
 
     // Same base pointer and same vtable => same object.
-    #[allow(renamed_and_removed_lints)]
-    #[allow(clippy::vtable_address_comparisons)] // for old clippy
     if std::ptr::eq(lhs, rhs) {
         return true;
     }

src/builtins/fish_indent.rs

@@ -357,7 +357,6 @@ fn compute_multi_line_brace_statement_locations(&self) -> Vec<usize> {
             {
                 next_newline += 1;
             }
-            #[allow(clippy::nonminimal_bool)] // for old clippy; false positive?
             let contains_newline = next_newline != newline_offsets.len() && {
                 let newline_offset = newline_offsets[next_newline];
                 assert!(newline_offset >= brace_statement.source_range().start());

src/env_dispatch.rs

@@ -175,8 +175,6 @@ pub fn guess_emoji_width(vars: &EnvStack) {
         .map(|v| v.as_string())
         .unwrap_or_else(WString::new);
 
-    #[allow(renamed_and_removed_lints)] // for old clippy
-    #[allow(clippy::blocks_in_if_conditions)] // for old clippy
     if xtversion().unwrap_or(L!("")).starts_with(L!("iTerm2 ")) {
         // iTerm2 now defaults to Unicode 9 sizes for anything after macOS 10.12
         FISH_EMOJI_WIDTH.store(2, Ordering::Relaxed);
@@ -610,7 +608,6 @@ pub fn use_posix_spawn() -> bool {
 }
 
 /// Whether or not we are running on an OS where we allow ourselves to use `posix_spawn()`.
-#[allow(clippy::needless_bool)] // for old clippy
 const fn allow_use_posix_spawn() -> bool {
     // OpenBSD's posix_spawn returns status 127 instead of erroring with ENOEXEC when faced with a
     // shebang-less script. Disable posix_spawn on OpenBSD.

src/reader.rs

@@ -2709,16 +2709,13 @@ fn send_xtgettcap_query(out: &mut impl Output, cap: &'static str) {
     out.write_command(QueryXtgettcap(cap));
 }
 
-#[allow(renamed_and_removed_lints)]
-#[allow(clippy::blocks_in_if_conditions)] // for old clippy
 fn query_capabilities_via_dcs(out: &mut impl Output, vars: &dyn Environment) {
-    if {
-        vars.get_unless_empty(L!("STY")).is_some()
-            || vars.get_unless_empty(L!("TERM")).is_some_and(|term| {
-                let term = &term.as_list()[0];
-                term == "screen" || term == "screen-256color"
-            })
-    } {
+    if vars.get_unless_empty(L!("STY")).is_some()
+        || vars.get_unless_empty(L!("TERM")).is_some_and(|term| {
+            let term = &term.as_list()[0];
+            term == "screen" || term == "screen-256color"
+        })
+    {
         return;
     }
     out.write_command(DecsetAlternateScreenBuffer); // enable alternative screen buffer
@@ -6358,12 +6355,14 @@ pub fn completion_apply_to_command_line(
             let (tok, _) = parse_util_token_extent(command_line, cursor_pos);
             maybe_add_slash(&mut trailer, &result[tok.start..new_cursor_pos]);
         }
+        // TODO(MSRV/edition 2024): use if let chain for quote instead of `is_some` followed
+        // by unwrap
         if trailer != '/'
             && quote.is_some()
             && unescaped_quote(command_line, insertion_point) != quote
         {
             // This is a quoted parameter, first print a quote.
-            #[allow(clippy::unnecessary_unwrap)] // for old clippy
+            #[allow(clippy::unnecessary_unwrap)]
             result.insert(new_cursor_pos, quote.unwrap());
             new_cursor_pos += 1;
         }