gh-102839: remove AC for math.log

[skirpichev]

Before:

$ ./python -m timeit -s 'from math import log' 'log(1.1)' 1000000 loops, best of 5: 344 nsec per loop
$ ./python -m timeit -s 'from math import log' 'log(1.1, 3.2)' 500000 loops, best of 5: 601 nsec per loop

After:

$ ./python -m timeit -s 'from math import log' 'log(1.1)' 2000000 loops, best of 5: 171 nsec per loop
$ ./python -m timeit -s 'from math import log' 'log(1.1, 3.2)' 1000000 loops, best of 5: 348 nsec per loop

• Issue: Speedup math.log by removing AC stuff #102839