many warnings cleaned up

src/multi/multi_test_case.rs

@@ -17,7 +17,7 @@
 use std::{collections::HashSet, path::PathBuf, rc::Rc};
 
 use crate::{
-    common::HybridBinarizer, qrcode::QRCodeReader, BarcodeFormat, BinaryBitmap,
+    common::HybridBinarizer, BarcodeFormat, BinaryBitmap,
     BufferedImageLuminanceSource, MultiFormatReader,
 };
 

src/multi/qrcode/detector/multi_detector.rs

@@ -15,7 +15,7 @@
  */
 
 use crate::{
-    common::{BitMatrix, DetectorRXingResult},
+    common::{BitMatrix},
     qrcode::detector::{Detector, QRCodeDetectorResult},
     DecodeHintType, DecodeHintValue, DecodingHintDictionary, Exceptions,
 };

src/multi/qrcode/detector/multi_finder_pattern_finder.rs

@@ -19,7 +19,7 @@ use std::cmp::Ordering;
 use crate::{
     common::BitMatrix,
     qrcode::detector::{FinderPattern, FinderPatternFinder, FinderPatternInfo},
-    result_point_utils, DecodeHintType, DecodingHintDictionary, Exceptions, RXingResultPoint,
+    result_point_utils, DecodeHintType, DecodingHintDictionary, Exceptions,
     RXingResultPointCallback,
 };