chore: apply some clippy fixes

src/common/bit_matrix.rs

@@ -677,11 +677,6 @@ impl BitMatrix {
      * @return string representation of entire matrix utilizing given strings and line separator
      * @deprecated call {@link #toString(String,String)} only, which uses \n line separator always
      */
-    // @Deprecated
-    // public String toString(String setString, String unsetString, String lineSeparator) {
-    //   return buildToString(setString, unsetString, lineSeparator);
-    // }
-
     fn buildToString(&self, setString: &str, unsetString: &str, lineSeparator: &str) -> String {
         let mut result =
             String::with_capacity((self.height * (self.width + 1)).try_into().unwrap());

src/common/grid_sampler.rs

@@ -36,7 +36,6 @@ use super::{BitMatrix, PerspectiveTransform, Quadrilateral};
  *
  * @author Sean Owen
  */
-
 pub trait GridSampler {
     //   /**
     //    * Sets the implementation of GridSampler used by the library. One global

src/oned/code_128_reader.rs

@@ -413,8 +413,8 @@ impl Code128Reader {
         one_d_reader::record_pattern(row, rowOffset, counters)?;
         let mut bestVariance = MAX_AVG_VARIANCE; // worst variance we'll accept
         let mut bestMatch = -1_isize;
-        for d in 0..CODE_PATTERNS.len() {
-            let pattern = &CODE_PATTERNS[d];
+        for (d, pattern) in CODE_PATTERNS.iter().enumerate() {
+            // for d in 0..CODE_PATTERNS.len() {
             let variance =
                 one_d_reader::pattern_match_variance(counters, pattern, MAX_INDIVIDUAL_VARIANCE);
             if variance < bestVariance {