Make log colours themeable

Signed-off-by: TheKodeToad <TheKodeToad@proton.me>

launcher/ui/themes/SystemTheme.h

@@ -48,7 +48,6 @@ class SystemTheme : public ITheme {
     QString qtTheme() override;
     bool hasStyleSheet() override;
     QString appStyleSheet() override;
-    bool hasColorScheme() override;
     QPalette colorScheme() override;
     double fadeAmount() override;
     QColor fadeColor() override;