fix(python)!: remove harmful `ipython` alias (#12676)

BREAKING CHANGE: the `ipython` alias was incorrectly trying to manually call
ipython from the installed module in the virtual environment, when actually
a command already exists when loading the virtual environment. This change
removes the unnecessary alias and allows calling the right command.

Fixes #12676

plugins/python/README.md

@@ -13,7 +13,6 @@ plugins=(... python)
 | Command          | Description                                                                            |
 | ---------------- | -------------------------------------------------------------------------------------- |
 | `py`             | Runs `python3`. Only set if `py` is not installed.                                     |
-| `ipython`        | Runs the appropriate `ipython` version according to the activated virtualenv           |
 | `pyfind`         | Finds .py files recursively in the current directory                                   |
 | `pyclean [dirs]` | Deletes byte-code and cache files from a list of directories or the current one        |
 | `pygrep <text>`  | Looks for `text` in `*.py` files in the current directory, recursively                 |

plugins/python/python.plugin.zsh

@@ -43,9 +43,6 @@ function pyuserpaths() {
 # Grep among .py files
 alias pygrep='grep -nr --include="*.py"'
 
-# Run proper IPython regarding current virtualenv (if any)
-alias ipython='python3 -c "import sys; del sys.path[0]; import IPython; sys.exit(IPython.start_ipython())"'
-
 # Share local directory as a HTTP server
 alias pyserver="python3 -m http.server"