This is my data:

Now here is what you need:

def remove_rows(df):
    df = df.reset_index(drop=True)
    if df[df['events'] == 1].index.empty:
        return df
    return df.loc[:df[df['events'] == 1].index[0]]

result = df.groupby('id').apply(lambda x: remove_rows(x)).reset_index(drop=True)
print(result)

Which will give you: