Remove redundant return_to_master_frame() function

waternsw_grabber/waternsw_grabber.py

@@ -39,12 +39,6 @@ def has_admin():
             return False
 
 
-def return_to_master_frame(driver):
-    driver.switch_to.default_content()
-    webhyd = driver.find_element_by_id('webhyd')
-    driver.switch_to.frame(webhyd)
-
-
 def wait_for_element(driver, by, x, timeout=60):
     try:
         element_present = EC.presence_of_element_located((by, x))