path = '/home/junha/Projects/foundry/'

import os

def FindFile(path, format):
    result = []
    
    for f in os.listdir(path):
        x = path + f
        if os.path.isdir(x):
            result += FindFile(x + '/', format)
        elif(f.split('.')[-1] == format):
            result.append(x)
    return result

def FindPos(file: str):
    x = file.split('\n')
    n = len(x)
    
    result = []
    for i in range(n):
        if i >= n - 2:
            break

        if x[i][0:3] == 'use' and x[i+2][0:3] == 'use' and x[i+1] == '':
            result.append(i+1)

    return result

import typing

def ApplyWork(file: str, pos: typing.List[int]):
    x = file.split('\n')

    for i in sorted(pos, reverse = True):
        del x[i]

    result = ""
    for l in x:
        result += l + '\n'
    
    return result[:-1]

for x in FindFile(path, 'rs'):
    res = None
    with open(x, 'r') as f:
        s = f.read()
        res = ApplyWork(s,  FindPos(s))
    with open(x, 'w') as f:
        f.write(res)