Removing items from list

[slackerman73]

I'm trying to remove an item from the passwords list.

I keep getting Traceback (most recent call last):
passwords.remove(websitetodelete) #This line is where I'm hung up. Trying to remove the websitetodelete from the previous line. I'm sure i'm not referencing the list correctly.
ValueError: list.remove(x): x not in list

Not sure

passwords = [["yahoo","XqffoZeo"],["google","CoIushujSetu"]]

while True:
    print("What would you like to do:")
    print(" 1. Open password file")
    print(" 2. Lookup a password")
    print(" 3. Add a password")
    print(" 4. Save password file")
    print(" 5. Print the encrypted password list (for testing)")
    print(" 6. Quit program")
    print(" 7. Delete a password")
    print("Please enter a number (1-7)")
    choice = input()

    if(choice == '7'): #Delete a password
        print("Which website do you want to delete?")
        for keyvalue in passwords:
            print(keyvalue[0]) #Printing the list of websites for the user to choose from.
        websitetodelete = input()  #Accepting the user's input for the website to remove.
        passwords.remove(websitetodelete)  #This line is where I'm hung up.  Trying to remove the websitetodelete from the previous line.  I'm sure i'm not referencing the list correctly.