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");