chore: remove ipython from dev dependencies

ipython is a nice to have, it is not *required* to develop on the
package.

Author: agateau-gg

Pipfile

@@ -13,7 +13,6 @@ black = "==22.3.0"
 coverage = "*"
 flake8 = "*"
 flake8-isort = "*"
-ipython = "*"
 isort = "*"
 pre-commit = "*"
 pytest = "*"