MLECO-3077: Add ASR use case API

* Minor adjustments to doc strings in KWS
* Remove unused score threshold in KWS

Signed-off-by: Richard Burton <richard.burton@arm.com>
Change-Id: Ie1c5bf6f7bdbebb853b6a10cb7ba1c4a1d9a76c9
diff --git a/source/use_case/kws/src/KwsProcessing.cc b/source/use_case/kws/src/KwsProcessing.cc
index b6b230c..14f9fce 100644
--- a/source/use_case/kws/src/KwsProcessing.cc
+++ b/source/use_case/kws/src/KwsProcessing.cc
@@ -197,11 +197,10 @@
 
     KWSPostProcess::KWSPostProcess(Classifier& classifier, Model* model,
                                    const std::vector<std::string>& labels,
-                                   std::vector<ClassificationResult>& results, float scoreThreshold)
+                                   std::vector<ClassificationResult>& results)
             :m_kwsClassifier{classifier},
              m_labels{labels},
-             m_results{results},
-             m_scoreThreshold{scoreThreshold}
+             m_results{results}
     {
         if (!model->IsInited()) {
             printf_err("Model is not initialised!.\n");
diff --git a/source/use_case/kws/src/UseCaseHandler.cc b/source/use_case/kws/src/UseCaseHandler.cc
index 350d34b..e73a2c3 100644
--- a/source/use_case/kws/src/UseCaseHandler.cc
+++ b/source/use_case/kws/src/UseCaseHandler.cc
@@ -93,7 +93,7 @@
         std::vector<ClassificationResult> singleInfResult;
         KWSPostProcess postprocess = KWSPostProcess(ctx.Get<KwsClassifier &>("classifier"), &model,
                                                     ctx.Get<std::vector<std::string>&>("labels"),
-                                                    singleInfResult, scoreThreshold);
+                                                    singleInfResult);
 
         UseCaseRunner runner = UseCaseRunner(&preprocess, &postprocess, &model);
 
@@ -146,7 +146,7 @@
                 /* Add results from this window to our final results vector. */
                 finalResults.emplace_back(kws::KwsResult(singleInfResult,
                         audioDataSlider.Index() * secondsPerSample * preprocess.m_audioDataStride,
-                        audioDataSlider.Index(), postprocess.m_scoreThreshold));
+                        audioDataSlider.Index(), scoreThreshold));
 
 #if VERIFY_TEST_OUTPUT
                 TfLiteTensor* outputTensor = model.GetOutputTensor(0);