clippy: fix warnings from needless_return lint

Author: cakebaker

src/uu/od/src/prn_float.rs

@@ -120,7 +120,7 @@ fn format_float(f: f64, width: usize, precision: usize) -> String {
     } else if l == -1 {
         format!("{f:width$.precision$}")
     } else {
-        return format_f64_exp_precision(f, width, precision - 1); // subnormal numbers
+        format_f64_exp_precision(f, width, precision - 1) // subnormal numbers
     }
 }
 

src/uu/split/src/split.rs

@@ -630,9 +630,9 @@ where
     } else if input == "-" {
         // STDIN stream that did not fit all content into a buffer
         // Most likely continuous/infinite input stream
-        return Err(io::Error::other(
+        Err(io::Error::other(
             translate!("split-error-cannot-determine-input-size", "input" => input),
-        ));
+        ))
     } else {
         // Could be that file size is larger than set read limit
         // Get the file size from filesystem metadata
@@ -655,9 +655,9 @@ where
                 // Give up and return an error
                 // TODO It might be possible to do more here
                 // to address all possible file types and edge cases
-                return Err(io::Error::other(
+                Err(io::Error::other(
                     translate!("split-error-cannot-determine-file-size", "input" => input),
-                ));
+                ))
             }
         }
     }

src/uucore/src/lib/features/checksum.rs

@@ -989,7 +989,7 @@ fn process_checksum_line(
         process_non_algo_based_line(i, &line_info, cli_algo, cli_algo_length, opts)
     } else {
         // We have no clue of what algorithm to use
-        return Err(LineCheckError::ImproperlyFormatted);
+        Err(LineCheckError::ImproperlyFormatted)
     }
 }