Remove unused local variables (#10528)

Fixes 26 SAT UnusedLocalVariable findings

Signed-off-by: Wouter Born <github@maindrain.net>

bundles/org.openhab.binding.irtrans/src/main/java/org/openhab/binding/irtrans/internal/handler/EthernetBridgeHandler.java

@@ -849,7 +849,6 @@ public class EthernetBridgeHandler extends BaseBridgeHandler implements Transcei
 
         Matcher matcher = RESPONSE_PATTERN.matcher(response);
         if (matcher.matches()) {
-            String byteCountAsString = matcher.group(1);
             message = matcher.group(2);
         }