Remove unused i variable

Author: damklis

airflow/modules/proxypool/proxypool_validator.py

@@ -21,7 +21,7 @@ def __init__(self, url, timeout=10, checks=3, sleep_interval=0.1):
 
  def validate_proxy(self, proxy_record):
  consecutive_checks = []
- for i in range(self.checks):
+ for _ in range(self.checks):
  content = self.parser.get_content(
  timeout=self.timeout,
  proxies=proxy_record.proxy