New rule: Unnecessary enumerate()

[ngnpope]

Fairly sure this is not covered by anything, but something I encountered due to autofixing B007.

Given the following example:

for i, s in enumerate("abc"):
    print(s)

I get the following output:

❯ ruff --version
ruff 0.0.241

❯ ruff --isolated --select B007 bug.py 
bug.py:1:5: B007 [*] Loop control variable `i` not used within loop body
Found 1 error.
[*] 1 potentially fixable with the --fix option.

❯ ruff --isolated --select B007 --fix bug.py 
Found 1 error (1 fixed, 0 remaining).

❯ cat bug.py 
for _i, s in enumerate("abc"):
    print(s)

We could probably identify when builtins.enumerate() is being used and autofix to:

for s in "abc":
    print(s)

[ngnpope]

Ah, this is covered here by FURB148 / no-ignored-enumerate-items.