diff --git a/src/plugins/coreplugin/find/searchresultwindow.cpp b/src/plugins/coreplugin/find/searchresultwindow.cpp
index 8711ad3b61f..d2b23e6f1e4 100644
--- a/src/plugins/coreplugin/find/searchresultwindow.cpp
+++ b/src/plugins/coreplugin/find/searchresultwindow.cpp
@@ -22,7 +22,6 @@
 #include <QFont>
 #include <QLabel>
 #include <QScrollArea>
-#include <QSettings>
 #include <QStackedWidget>
 #include <QToolButton>
 
diff --git a/src/plugins/coreplugin/systemsettings.cpp b/src/plugins/coreplugin/systemsettings.cpp
index a40930b980f..26527a4286e 100644
--- a/src/plugins/coreplugin/systemsettings.cpp
+++ b/src/plugins/coreplugin/systemsettings.cpp
@@ -31,7 +31,6 @@
 #include <QLineEdit>
 #include <QMessageBox>
 #include <QPushButton>
-#include <QSettings>
 #include <QToolButton>
 
 using namespace Utils;
diff --git a/src/plugins/cppeditor/cppincludehierarchy.cpp b/src/plugins/cppeditor/cppincludehierarchy.cpp
index 130cf35472f..3ee1efc6af9 100644
--- a/src/plugins/cppeditor/cppincludehierarchy.cpp
+++ b/src/plugins/cppeditor/cppincludehierarchy.cpp
@@ -33,7 +33,6 @@
 #include <QCoreApplication>
 #include <QKeyEvent>
 #include <QLabel>
-#include <QSettings>
 #include <QStackedWidget>
 #include <QTimer>
 #include <QToolButton>
diff --git a/src/plugins/fakevim/fakevimplugin.cpp b/src/plugins/fakevim/fakevimplugin.cpp
index 496fdd786f6..f14cbbb2027 100644
--- a/src/plugins/fakevim/fakevimplugin.cpp
+++ b/src/plugins/fakevim/fakevimplugin.cpp
@@ -73,7 +73,6 @@
 #include <QPushButton>
 #include <QRegularExpression>
 #include <QScrollBar>
-#include <QSettings>
 #include <QStackedWidget>
 #include <QStandardPaths>
 #include <QStyleHints>
diff --git a/src/plugins/languageclient/languageclientsettings.cpp b/src/plugins/languageclient/languageclientsettings.cpp
index 8b406c2d1c0..1fa4c5ed377 100644
--- a/src/plugins/languageclient/languageclientsettings.cpp
+++ b/src/plugins/languageclient/languageclientsettings.cpp
@@ -44,7 +44,6 @@
 #include <QMenu>
 #include <QMimeData>
 #include <QPushButton>
-#include <QSettings>
 #include <QSortFilterProxyModel>
 #include <QStringListModel>
 #include <QToolButton>
diff --git a/src/plugins/macros/macromanager.cpp b/src/plugins/macros/macromanager.cpp
index a5e01155893..b5151b7ee25 100644
--- a/src/plugins/macros/macromanager.cpp
+++ b/src/plugins/macros/macromanager.cpp
@@ -28,7 +28,6 @@
 #include <QDir>
 #include <QFile>
 #include <QFileInfo>
-#include <QSettings>
 #include <QList>
 
 #include <QAction>
diff --git a/src/plugins/perforce/perforceplugin.cpp b/src/plugins/perforce/perforceplugin.cpp
index aa4d9e90c0c..a94a12adb30 100644
--- a/src/plugins/perforce/perforceplugin.cpp
+++ b/src/plugins/perforce/perforceplugin.cpp
@@ -49,7 +49,6 @@
 #include <QMenu>
 #include <QMessageBox>
 #include <QRegularExpression>
-#include <QSettings>
 #include <QTextCodec>
 
 using namespace Core;
diff --git a/src/plugins/projectexplorer/allprojectsfind.cpp b/src/plugins/projectexplorer/allprojectsfind.cpp
index 1c8f4c9d94a..c2cee55e309 100644
--- a/src/plugins/projectexplorer/allprojectsfind.cpp
+++ b/src/plugins/projectexplorer/allprojectsfind.cpp
@@ -17,7 +17,6 @@
 #include <utils/qtcsettings.h>
 
 #include <QGridLayout>
-#include <QSettings>
 
 using namespace ProjectExplorer;
 using namespace ProjectExplorer::Internal;
diff --git a/src/plugins/projectexplorer/devicesupport/sshsettings.cpp b/src/plugins/projectexplorer/devicesupport/sshsettings.cpp
index 083ad062c99..f815ef058b4 100644
--- a/src/plugins/projectexplorer/devicesupport/sshsettings.cpp
+++ b/src/plugins/projectexplorer/devicesupport/sshsettings.cpp
@@ -8,7 +8,6 @@
 #include <utils/qtcsettings.h>
 
 #include <QReadWriteLock>
-#include <QSettings>
 
 using namespace Utils;
 
diff --git a/src/plugins/projectexplorer/kitchooser.cpp b/src/plugins/projectexplorer/kitchooser.cpp
index b4d0031cd45..4830f617f5f 100644
--- a/src/plugins/projectexplorer/kitchooser.cpp
+++ b/src/plugins/projectexplorer/kitchooser.cpp
@@ -14,7 +14,6 @@
 #include <QComboBox>
 #include <QHBoxLayout>
 #include <QPushButton>
-#include <QSettings>
 
 using namespace Core;
 using namespace Utils;
diff --git a/src/plugins/projectexplorer/kitmanager.cpp b/src/plugins/projectexplorer/kitmanager.cpp
index d206234cbd1..792d7e86a63 100644
--- a/src/plugins/projectexplorer/kitmanager.cpp
+++ b/src/plugins/projectexplorer/kitmanager.cpp
@@ -33,7 +33,6 @@
 #include <QHash>
 #include <QLabel>
 #include <QPushButton>
-#include <QSettings>
 #include <QStyle>
 
 using namespace Core;
diff --git a/src/plugins/projectexplorer/projectexplorer.cpp b/src/plugins/projectexplorer/projectexplorer.cpp
index e5dc64d79c9..ddd07732c90 100644
--- a/src/plugins/projectexplorer/projectexplorer.cpp
+++ b/src/plugins/projectexplorer/projectexplorer.cpp
@@ -148,7 +148,6 @@
 #include <QMessageBox>
 #include <QPair>
 #include <QPushButton>
-#include <QSettings>
 #include <QThreadPool>
 #include <QTimer>
 #include <QVBoxLayout>
diff --git a/src/plugins/qmldesigner/components/propertyeditor/gradientpresetlistmodel.cpp b/src/plugins/qmldesigner/components/propertyeditor/gradientpresetlistmodel.cpp
index b4b41773321..da6e67993e6 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/gradientpresetlistmodel.cpp
+++ b/src/plugins/qmldesigner/components/propertyeditor/gradientpresetlistmodel.cpp
@@ -7,7 +7,6 @@
 #include <QHash>
 #include <QByteArray>
 #include <QDebug>
-#include <QSettings>
 
 GradientPresetListModel::GradientPresetListModel(QObject *parent)
     : QAbstractListModel(parent)
diff --git a/src/plugins/qtsupport/codegenerator.cpp b/src/plugins/qtsupport/codegenerator.cpp
index 5e9437b8184..2188e59012a 100644
--- a/src/plugins/qtsupport/codegenerator.cpp
+++ b/src/plugins/qtsupport/codegenerator.cpp
@@ -11,7 +11,6 @@
 #include <utils/qtcassert.h>
 
 #include <QDomDocument>
-#include <QSettings>
 #include <QTextStream>
 #include <QXmlStreamReader>
 
diff --git a/src/plugins/qtsupport/qtversionmanager.cpp b/src/plugins/qtsupport/qtversionmanager.cpp
index 4674bb07075..941bd763b69 100644
--- a/src/plugins/qtsupport/qtversionmanager.cpp
+++ b/src/plugins/qtsupport/qtversionmanager.cpp
@@ -29,7 +29,6 @@
 #include <QDir>
 #include <QFile>
 #include <QLoggingCategory>
-#include <QSettings>
 #include <QStandardPaths>
 #include <QStringList>
 #include <QTextStream>
diff --git a/src/plugins/squish/squishsettings.cpp b/src/plugins/squish/squishsettings.cpp
index 8d4cfe5ded0..bfa0a127d18 100644
--- a/src/plugins/squish/squishsettings.cpp
+++ b/src/plugins/squish/squishsettings.cpp
@@ -22,7 +22,6 @@
 #include <QFrame>
 #include <QHeaderView>
 #include <QPushButton>
-#include <QSettings>
 #include <QVBoxLayout>
 #include <QXmlStreamReader>
 
diff --git a/src/plugins/texteditor/basefilefind.cpp b/src/plugins/texteditor/basefilefind.cpp
index efea4e9ba17..2e7ae4471df 100644
--- a/src/plugins/texteditor/basefilefind.cpp
+++ b/src/plugins/texteditor/basefilefind.cpp
@@ -31,7 +31,6 @@
 #include <QPair>
 #include <QPointer>
 #include <QPromise>
-#include <QSettings>
 #include <QStringListModel>
 
 using namespace Utils;
diff --git a/src/plugins/texteditor/findinfiles.cpp b/src/plugins/texteditor/findinfiles.cpp
index 3fa4de9b59a..c8a6531ba65 100644
--- a/src/plugins/texteditor/findinfiles.cpp
+++ b/src/plugins/texteditor/findinfiles.cpp
@@ -16,7 +16,6 @@
 #include <QComboBox>
 #include <QGridLayout>
 #include <QLabel>
-#include <QSettings>
 #include <QStackedWidget>
 
 using namespace Core;
diff --git a/src/plugins/texteditor/tabsettings.cpp b/src/plugins/texteditor/tabsettings.cpp
index c6c0558636f..e0c5142dcce 100644
--- a/src/plugins/texteditor/tabsettings.cpp
+++ b/src/plugins/texteditor/tabsettings.cpp
@@ -4,7 +4,6 @@
 #include "tabsettings.h"
 
 #include <QDebug>
-#include <QSettings>
 #include <QTextCursor>
 #include <QTextDocument>