Auto merge of #13182 - Alexendoo:remove-allows, r=Manishearth

Remove some miscellaneous `#[allow]`s

Some were unneeded, others were removed by fixing/removing the thing they allow

changelog: none

clippy_dev/src/serve.rs

@@ -1,5 +1,3 @@
-use std::ffi::OsStr;
-use std::num::ParseIntError;
 use std::path::Path;
 use std::process::Command;
 use std::time::{Duration, SystemTime};
@@ -58,8 +56,3 @@ fn mtime(path: impl AsRef<Path>) -> SystemTime {
             .unwrap_or(SystemTime::UNIX_EPOCH)
     }
 }
-
-#[allow(clippy::missing_errors_doc)]
-pub fn validate_port(arg: &OsStr) -> Result<(), ParseIntError> {
-    arg.to_string_lossy().parse::<u16>().map(|_| ())
-}

clippy_lints/src/incompatible_msrv.rs

@@ -55,7 +55,6 @@ impl IncompatibleMsrv {
         }
     }
 
-    #[allow(clippy::cast_lossless)]
     fn get_def_id_version(&mut self, tcx: TyCtxt<'_>, def_id: DefId) -> RustcVersion {
         if let Some(version) = self.is_above_msrv.get(&def_id) {
             return *version;
@@ -67,9 +66,9 @@ impl IncompatibleMsrv {
                     since: StableSince::Version(version),
                     ..
                 } => Some(RustcVersion::new(
-                    version.major as _,
-                    version.minor as _,
-                    version.patch as _,
+                    version.major.into(),
+                    version.minor.into(),
+                    version.patch.into(),
                 )),
                 _ => None,
             }) {

clippy_lints/src/indexing_slicing.rs

@@ -70,8 +70,6 @@ declare_clippy_lint! {
     ///
     /// Use instead:
     /// ```no_run
-    /// # #![allow(unused)]
-    ///
     /// # let x = vec![0; 5];
     /// # let y = [0, 1, 2, 3];
     /// x.get(2);

clippy_lints/src/infinite_iter.rs

@@ -41,7 +41,6 @@ declare_clippy_lint! {
     /// ### Example
     /// ```no_run
     /// let infinite_iter = 0..;
-    /// # #[allow(unused)]
     /// [0..].iter().zip(infinite_iter.take_while(|x| *x > 5));
     /// ```
     #[clippy::version = "pre 1.29.0"]

clippy_lints/src/lib.rs

@@ -966,10 +966,3 @@ pub fn register_renamed(ls: &mut rustc_lint::LintStore) {
         ls.register_renamed(old_name, new_name);
     }
 }
-
-// only exists to let the dogfood integration test works.
-// Don't run clippy as an executable directly
-#[allow(dead_code)]
-fn main() {
-    panic!("Please use the cargo-clippy executable");
-}

clippy_lints/src/methods/iter_kv_map.rs

@@ -1,15 +1,12 @@
-#![allow(unused_imports)]
-
 use super::ITER_KV_MAP;
 use clippy_config::msrvs::{self, Msrv};
-use clippy_utils::diagnostics::{multispan_sugg, span_lint_and_sugg, span_lint_and_then};
-use clippy_utils::source::{snippet, snippet_with_applicability};
+use clippy_utils::diagnostics::span_lint_and_sugg;
+use clippy_utils::pat_is_wild;
+use clippy_utils::source::snippet_with_applicability;
 use clippy_utils::ty::is_type_diagnostic_item;
-use clippy_utils::{pat_is_wild, sugg};
-use rustc_hir::{BindingMode, Body, BorrowKind, ByRef, Expr, ExprKind, Mutability, Pat, PatKind};
-use rustc_lint::{LateContext, LintContext};
-use rustc_middle::ty;
-use rustc_span::{sym, Span};
+use rustc_hir::{Body, Expr, ExprKind, PatKind};
+use rustc_lint::LateContext;
+use rustc_span::sym;
 
 /// lint use of:
 ///

clippy_lints/src/methods/mod.rs

@@ -749,7 +749,6 @@ declare_clippy_lint! {
     ///
      /// ### Example
     /// ```no_run
-    /// # #![allow(unused)]
     /// (0_i32..10)
     ///     .filter(|n| n.checked_add(1).is_some())
     ///     .map(|n| n.checked_add(1).unwrap());
@@ -757,7 +756,6 @@ declare_clippy_lint! {
     ///
     /// Use instead:
     /// ```no_run
-    /// # #[allow(unused)]
     /// (0_i32..10).filter_map(|n| n.checked_add(1));
     /// ```
     #[clippy::version = "1.51.0"]
@@ -850,7 +848,6 @@ declare_clippy_lint! {
     ///
     /// ### Example
     /// ```no_run
-    /// # #![allow(unused)]
     /// let vec = vec![1];
     /// vec.iter().find(|x| **x == 0).is_some();
     ///
@@ -862,7 +859,6 @@ declare_clippy_lint! {
     /// let vec = vec![1];
     /// vec.iter().any(|x| *x == 0);
     ///
-    /// # #[allow(unused)]
     /// !"hello world".contains("world");
     /// ```
     #[clippy::version = "pre 1.29.0"]
@@ -1505,7 +1501,6 @@ declare_clippy_lint! {
     ///
     /// ### Example
     /// ```no_run
-    /// # #[allow(unused)]
     /// (0..3).fold(false, |acc, x| acc || x > 2);
     /// ```
     ///
@@ -2008,13 +2003,11 @@ declare_clippy_lint! {
     ///
     /// ### Example
     /// ```no_run
-    /// # #[allow(unused)]
     /// "Hello".bytes().nth(3);
     /// ```
     ///
     /// Use instead:
     /// ```no_run
-    /// # #[allow(unused)]
     /// "Hello".as_bytes().get(3);
     /// ```
     #[clippy::version = "1.52.0"]
@@ -2059,7 +2052,6 @@ declare_clippy_lint! {
     ///
     /// ### Example
     /// ```no_run
-    /// # #![allow(unused)]
     /// let some_vec = vec![0, 1, 2, 3];
     ///
     /// some_vec.iter().count();
@@ -3656,7 +3648,6 @@ declare_clippy_lint! {
     ///
     /// ### Example
     /// ```no_run
-    /// # #![allow(unused)]
     /// let owned_string = "This is a string".to_owned();
     /// owned_string.as_str().as_bytes()
     /// # ;
@@ -3664,7 +3655,6 @@ declare_clippy_lint! {
     ///
     /// Use instead:
     /// ```no_run
-    /// # #![allow(unused)]
     /// let owned_string = "This is a string".to_owned();
     /// owned_string.as_bytes()
     /// # ;

clippy_lints/src/only_used_in_recursion.rs

@@ -243,7 +243,6 @@ impl<'tcx> LateLintPass<'tcx> for OnlyUsedInRecursion {
                 owner_id,
                 ..
             }) => {
-                #[allow(trivial_casts)]
                 if let Node::Item(item) = cx.tcx.parent_hir_node(owner_id.into())
                     && let Some(trait_ref) = cx
                         .tcx

clippy_utils/src/lib.rs

@@ -589,9 +589,8 @@ fn find_primitive_impls<'tcx>(tcx: TyCtxt<'tcx>, name: &str) -> impl Iterator<It
         "u128" => SimplifiedType::Uint(UintTy::U128),
         "f32" => SimplifiedType::Float(FloatTy::F32),
         "f64" => SimplifiedType::Float(FloatTy::F64),
-        #[allow(trivial_casts)]
         _ => {
-            return Result::<_, rustc_errors::ErrorGuaranteed>::Ok(&[] as &[_])
+            return Result::<&[_], rustc_errors::ErrorGuaranteed>::Ok(&[])
                 .into_iter()
                 .flatten()
                 .copied();