matplotlib.pyplot: How to remove extra white spaces inside savefig?

I'm generating a pie chart and receiving additional space around it in the save figure, especially on the left side. You can see the attached figure.

Here is the code:

    fig, ax = plt.subplots()
    ax.axis("equal")
    explode = tuple(np.ones(len(class_map)) * 0.05)
    #target_count = float(target_count)
    t_c = np.array(target_count)
    porcent = 100.*t_c/t_c.sum()

    labels = ['{0} - {1:1.2f} %'.format(i,j) for i,j in zip(class_map, porcent)]
    patches, texts = ax.pie(
        target_count,
        explode=explode,
        pctdistance=1.1,
        labeldistance=0.6, 
        shadow=False,
    radius = 0.3,
        startangle=0,
        colors=color_map,
        wedgeprops={"linewidth": 1, "edgecolor": "k"},
    )
    box = ax.get_position()
    ax.set_position([box.x0, box.y0, box.width, box.height])  

    plt.title("Goone", fontdict = {'fontsize' : 25})
    plt.legend(patches, labels, loc="center left", bbox_to_anchor=(0.70, 0.5))  
    plt.tight_layout()
    # plt.show()
    save_name = os.path.join(path_save, prefix + ".png")
    fig.savefig(save_name, bbox_inches="tight")
    plt.close()

Note: I tried every possible option available on the internet but could not remove the white spaces.