Remove unused import

Author: bzaczynski

complex-numbers/mandelbrot.ipynb

@@ -20,7 +20,7 @@
    "outputs": [],
    "source": [
     "from typing import NamedTuple\n",
-    "from math import log, log2\n",
+    "from math import log\n",
     "\n",
     "import PIL.Image\n",
     "from PIL.ImageColor import getrgb\n",