made appbase compile standalone

src/util/Clamp.hpp

@@ -1,13 +0,0 @@
-#pragma once
-
-namespace chatterino {
-
-// http://en.cppreference.com/w/cpp/algorithm/clamp
-
-template <class T>
-constexpr const T &clamp(const T &v, const T &lo, const T &hi)
-{
-    return assert(!(hi < lo)), (v < lo) ? lo : (hi < v) ? hi : v;
-}
-
-}  // namespace chatterino

src/util/FunctionEventFilter.cpp

@@ -1,17 +0,0 @@
-#include "FunctionEventFilter.hpp"
-
-namespace chatterino {
-
-FunctionEventFilter::FunctionEventFilter(
-    QObject *parent, std::function<bool(QObject *, QEvent *)> function)
-    : QObject(parent)
-    , function_(std::move(function))
-{
-}
-
-bool FunctionEventFilter::eventFilter(QObject *watched, QEvent *event)
-{
-    return this->function_(watched, event);
-}
-
-}  // namespace chatterino

src/util/FunctionEventFilter.hpp

@@ -1,24 +0,0 @@
-#pragma once
-
-#include <QEvent>
-#include <QObject>
-#include <functional>
-
-namespace chatterino {
-
-class FunctionEventFilter : public QObject
-{
-    Q_OBJECT
-
-public:
-    FunctionEventFilter(QObject *parent,
-                        std::function<bool(QObject *, QEvent *)> function);
-
-protected:
-    bool eventFilter(QObject *watched, QEvent *event) override;
-
-private:
-    std::function<bool(QObject *, QEvent *)> function_;
-};
-
-}  // namespace chatterino