Cleared warnings

app/src/main/java/com/example/jnicpp/bowling/DebugSessionLogger.kt

@@ -16,6 +16,7 @@ import java.io.FileOutputStream
 import java.io.OutputStreamWriter
 import java.text.SimpleDateFormat
 import java.util.Locale
+import kotlin.math.sqrt
 
 /**
  * @brief Writes one line per analyzed frame -- landmark confidence,
@@ -64,7 +65,7 @@ class DebugSessionLogger(private val appContext: Context) {
                 dir.mkdirs()
                 FileOutputStream(File(dir, fileName))
             }
-        } catch (e: Exception) {
+        } catch (_: Exception) {
             null
         }
         writer = outputStream?.let { BufferedWriter(OutputStreamWriter(it)) }
@@ -72,7 +73,7 @@ class DebugSessionLogger(private val appContext: Context) {
         writer?.let {
             it.write(
                 "timestampMs dtMs ankleL(y,lik) ankleR(y,lik) hipL(y,lik) hipR(y,lik) shoulderL(y,lik) shoulderR(y,lik) " +
-                    "wristL(y,lik) wristR(y,lik) torsoScalePx stepCount"
+                    "wristL(y,lik) wristR(y,lik) torsoScalePx stepCount",
             )
             it.newLine()
             it.flush()
@@ -108,7 +109,7 @@ class DebugSessionLogger(private val appContext: Context) {
             "${format(shoulderL)} ${format(shoulderR)} " +
             "${format(wristL)} ${format(wristR)} " +
             "${torsoScale?.let { "%.1f".format(it) } ?: "-"} " +
-            "$stepCount"
+            stepCount.toString()
 
         try {
             out.write(line)
@@ -117,7 +118,7 @@ class DebugSessionLogger(private val appContext: Context) {
             // stopped mid-recording the file should still have everything
             // logged up to that point rather than losing a buffered tail.
             out.flush()
-        } catch (e: Exception) {
+        } catch (_: Exception) {
             // A failed debug write shouldn't disrupt the actual recording.
         }
     }
@@ -126,7 +127,7 @@ class DebugSessionLogger(private val appContext: Context) {
     fun stop() {
         try {
             writer?.close()
-        } catch (e: Exception) {
+        } catch (_: Exception) {
             // Nothing useful to do about a failed close on a debug file.
         }
         writer = null
@@ -140,12 +141,12 @@ class DebugSessionLogger(private val appContext: Context) {
         shoulderL: SmoothedLandmark?,
         shoulderR: SmoothedLandmark?,
         hipL: SmoothedLandmark?,
-        hipR: SmoothedLandmark?
+        hipR: SmoothedLandmark?,
     ): Float? {
         val shoulder = shoulderL ?: shoulderR ?: return null
         val hip = hipL ?: hipR ?: return null
         val dx = shoulder.x - hip.x
         val dy = shoulder.y - hip.y
-        return kotlin.math.sqrt(dx * dx + dy * dy).takeIf { it > 0f }
+        return sqrt((dx * dx + dy * dy)).takeIf { it > 0f }
     }
 }