如何根据两列去重，去掉pandas数据框中最大的第3列？

import pandas as pd

data = {'Column1': [1, 2, 3, 1, 2, 3],
        'Column2': ['A', 'B', 'C', 'A', 'B', 'C'],
        'Column3': [10, 20, 30, 40, 50, 60]}
df = pd.DataFrame(data)

df = df.drop_duplicates(subset=['Column1', 'Column2'])

max_value = df['Column3'].max()
df = df.drop(df[df['Column3'] == max_value].index)
df = df.drop('Column3', axis=1)