removed SplitColumn

src/widgets/splits/SplitColumn.cpp

@@ -1,7 +0,0 @@
-#include "SplitColumn.hpp"
-
-namespace chatterino {
-namespace helper {
-
-}  // namespace helper
-}  // namespace chatterino

src/widgets/splits/SplitColumn.hpp

@@ -1,23 +0,0 @@
-#pragma once
-
-#include "widgets/splits/Split.hpp"
-
-#include <vector>
-
-namespace chatterino {
-
-class SplitColumn
-{
-public:
-    SplitColumn() = default;
-
-    void insert(Split *split, int index = -1);
-    void remove(int index);
-    double getFlex();
-    void setFlex(double flex);
-
-private:
-    std::vector<Split> items;
-};
-
-}  // namespace chatterino