ui: remove tests/playsound.cc (#32870)

remove playsound.cc
old-commit-hash: a312a102aa

selfdrive/ui/tests/.gitignore

@@ -1,6 +1,4 @@
 test
-playsound
-test_sound
 test_translations
 ui_snapshot
 test_ui/report

selfdrive/ui/tests/playsound.cc

@@ -1,30 +0,0 @@
-#include <QApplication>
-#include <QSoundEffect>
-#include <QTimer>
-#include <QDebug>
-
-int main(int argc, char **argv) {
-
-  QApplication a(argc, argv);
-
-  QTimer::singleShot(0, [=]{
-    QSoundEffect s;
-    const char *vol = getenv("VOLUME");
-    s.setVolume(vol ? atof(vol) : 1.0);
-    for (int i = 1; i < argc; i++) {
-      QString fn = argv[i];
-      qDebug() << "playing" << fn;
-
-      QEventLoop loop;
-      s.setSource(QUrl::fromLocalFile(fn));
-      QEventLoop::connect(&s, &QSoundEffect::loadedChanged, &loop, &QEventLoop::quit);
-      loop.exec();
-      s.play();
-      QEventLoop::connect(&s, &QSoundEffect::playingChanged, &loop, &QEventLoop::quit);
-      loop.exec();
-    }
-    QCoreApplication::exit();
-  });
-
-  return a.exec();
-}