How to remove first occurrence of a letter?

I am assuming that you do not remove anything if the letter is not contained in the string, so you can use the following code:

Strictly not using splicing

new_string = ''
found = False

for i in range(len(remWord)):
    if remWord[i] != remLetter or found:
        new_string += remWord[i]
    else:
        found = True

If you are allowed to use splicing

new_string = ''

for i in range(len(remWord)):
    if remWord[i] != remLetter:
        new_string += remWord[i]
    else:
        break

new_string += remWord[i + 1:]