diff --git a/src/uu/mcookie/src/mcookie.rs b/src/uu/mcookie/src/mcookie.rs
index 997ca22..46630f6 100644
--- a/src/uu/mcookie/src/mcookie.rs
+++ b/src/uu/mcookie/src/mcookie.rs
@@ -3,8 +3,6 @@
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 
-#[cfg(unix)]
-use std::os::unix::fs::FileTypeExt;
 use std::{
     fs::File,
     io::{stdin, Read},
@@ -51,14 +49,14 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
                 if s == 0 {
                     s = MAX_DEFAULT;
                 }
-                Some(s)
+                s
             }
             Err(_) => {
                 return Err(USimpleError::new(1, "Failed to parse max-size value"));
             }
         }
     } else {
-        Some(MAX_DEFAULT)
+        MAX_DEFAULT
     };
 
     let mut hasher = Md5::new();
@@ -69,14 +67,10 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
 
         if file_path == "-" {
             input_name = "stdin";
-            let mut stdin_handle = stdin();
+            let stdin_handle = stdin();
 
-            if let Some(max_bytes) = &max_size {
-                let mut limited_reader = stdin_handle.take(*max_bytes);
-                limited_reader.read_to_end(&mut buffer)?;
-            } else {
-                stdin_handle.read_to_end(&mut buffer)?;
-            }
+            let mut limited_reader = stdin_handle.take(max_size);
+            limited_reader.read_to_end(&mut buffer)?;
         } else {
             input_name = file_path;
             let open_result = File::open(file_path);
@@ -85,28 +79,9 @@ pub fn uumain(args: impl uucore::Args) -> UResult<()> {
                 continue;
             }
 
-            let mut f = open_result.unwrap();
-            if let Some(max_bytes) = &max_size {
-                let mut limited_reader = f.take(*max_bytes);
-                limited_reader.read_to_end(&mut buffer)?;
-            } else {
-                #[cfg(unix)]
-                {
-                    const DEFAULT_SEED_READ_BYTES: u64 = 1024;
-                    let metadata = f.metadata()?;
-
-                    if metadata.file_type().is_char_device() {
-                        let mut handle = f.take(DEFAULT_SEED_READ_BYTES);
-                        handle.read_to_end(&mut buffer)?;
-                    } else {
-                        f.read_to_end(&mut buffer)?;
-                    }
-                }
-                #[cfg(not(unix))]
-                {
-                    f.read_to_end(&mut buffer)?;
-                }
-            }
+            let f = open_result.unwrap();
+            let mut limited_reader = f.take(max_size);
+            limited_reader.read_to_end(&mut buffer)?;
         }
 
         if verbose {