Method removeTheme

src/core/theme.cpp:11–14

};

void BruceTheme::removeTheme(void) {
    themeInfo t;
    theme = t;
}
FS *BruceTheme::themeFS(void) {
    if (theme.fs == 1) return &LittleFS;
    else if (theme.fs == 2) return &SD;