diff --git a/src/cli.rs b/src/cli.rs
index 46f4706fb5..42191a7455 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -1,15 +1,12 @@
-use std::fmt;
 use std::path::PathBuf;
 
 use clap::{command, Parser};
 use fnv::FnvHashMap;
-use log::warn;
 use regex::Regex;
 
 use crate::checks_gen::CheckCodePrefix;
 use crate::logging::LogLevel;
 use crate::printer::SerializationFormat;
-use crate::settings::configuration::Configuration;
 use crate::settings::types::{PatternPrefixPair, PerFileIgnore, PythonVersion};
 
 #[derive(Debug, Parser)]
@@ -137,64 +134,6 @@ pub fn extract_log_level(cli: &Cli) -> LogLevel {
     }
 }
 
-pub enum Warnable {
-    Select,
-    ExtendSelect,
-}
-
-impl fmt::Display for Warnable {
-    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
-        match self {
-            Warnable::Select => fmt.write_str("--select"),
-            Warnable::ExtendSelect => fmt.write_str("--extend-select"),
-        }
-    }
-}
-
-/// Warn the user if they attempt to enable a code that won't be respected.
-pub fn warn_on(
-    flag: Warnable,
-    codes: &[CheckCodePrefix],
-    cli_ignore: &[CheckCodePrefix],
-    cli_extend_ignore: &[CheckCodePrefix],
-    pyproject_configuration: &Configuration,
-    pyproject_path: Option<&PathBuf>,
-) {
-    for code in codes {
-        if !cli_ignore.is_empty() {
-            if cli_ignore.contains(code) {
-                warn!("{code:?} was passed to {flag}, but ignored via --ignore")
-            }
-        } else if pyproject_configuration.ignore.contains(code) {
-            if let Some(path) = pyproject_path {
-                warn!(
-                    "{code:?} was passed to {flag}, but ignored by the `ignore` field in {}",
-                    path.to_string_lossy()
-                )
-            } else {
-                warn!("{code:?} was passed to {flag}, but ignored by the default `ignore` field",)
-            }
-        }
-        if !cli_extend_ignore.is_empty() {
-            if cli_extend_ignore.contains(code) {
-                warn!("{code:?} was passed to {flag}, but ignored via --extend-ignore")
-            }
-        } else if pyproject_configuration.extend_ignore.contains(code) {
-            if let Some(path) = pyproject_path {
-                warn!(
-                    "{code:?} was passed to {flag}, but ignored by the `extend_ignore` field in {}",
-                    path.to_string_lossy()
-                )
-            } else {
-                warn!(
-                    "{code:?} was passed to {flag}, but ignored by the default `extend_ignore` \
-                     field"
-                )
-            }
-        }
-    }
-}
-
 /// Convert a list of `PatternPrefixPair` structs to `PerFileIgnore`.
 pub fn collect_per_file_ignores(
     pairs: Vec<PatternPrefixPair>,
diff --git a/src/main.rs b/src/main.rs
index ec44a8b2ad..2e023bbc43 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -7,7 +7,7 @@ use std::time::Instant;
 #[cfg(not(target_family = "wasm"))]
 use ::ruff::cache;
 use ::ruff::checks::{CheckCode, CheckKind};
-use ::ruff::cli::{collect_per_file_ignores, extract_log_level, warn_on, Cli, Warnable};
+use ::ruff::cli::{collect_per_file_ignores, extract_log_level, Cli};
 use ::ruff::fs::iter_python_files;
 use ::ruff::linter::{add_noqa_to_path, autoformat_path, lint_path, lint_stdin};
 use ::ruff::logging::{set_up_logging, LogLevel};
@@ -240,25 +240,9 @@ fn inner_main() -> Result<ExitCode> {
             collect_per_file_ignores(cli.per_file_ignores, project_root.as_ref());
     }
     if !cli.select.is_empty() {
-        warn_on(
-            Warnable::Select,
-            &cli.select,
-            &cli.ignore,
-            &cli.extend_ignore,
-            &configuration,
-            pyproject.as_ref(),
-        );
         configuration.select = cli.select;
     }
     if !cli.extend_select.is_empty() {
-        warn_on(
-            Warnable::ExtendSelect,
-            &cli.extend_select,
-            &cli.ignore,
-            &cli.extend_ignore,
-            &configuration,
-            pyproject.as_ref(),
-        );
         configuration.extend_select = cli.extend_select;
     }
     if !cli.ignore.is_empty() {