[libcalamares] Tidy up includes

- Remove commented-out includes
- Consistent punctuation

src/libcalamares/utils/TestPaths.cpp

@@ -26,14 +26,8 @@
 #include "JobQueue.h"
 
 #include <QDir>
-// #include <QTemporaryFile>
-
 #include <QtTest/QtTest>
 
-// #include <fcntl.h>
-// #include <sys/stat.h>
-// #include <unistd.h>
-
 class TestPaths : public QObject
 {
     Q_OBJECT

src/libcalamaresui/utils/ImageRegistry.cpp

@@ -25,9 +25,9 @@
 
 #include "ImageRegistry.h"
 
+#include <QIcon>
 #include <QPainter>
 #include <QSvgRenderer>
-#include <qicon.h>
 
 static QHash< QString, QHash< int, QHash< qint64, QPixmap > > > s_cache;
 

src/libcalamaresui/viewpages/ExecutionViewStep.h

@@ -20,7 +20,7 @@
 #ifndef EXECUTIONVIEWSTEP_H
 #define EXECUTIONVIEWSTEP_H
 
-#include <viewpages/ViewStep.h>
+#include "ViewStep.h"
 
 #include <QStringList>