docs: remove installation of python on Linux (project-chip#19252)

Debian-based distributions already included python, so it does not need
to be installed again.

Additionally, on Ubuntu 22.04 on Raspberry Pi, there is no package named
"python", causing this command to fail.

docs/guides/BUILDING.md

@@ -43,7 +43,7 @@ On Debian-based Linux distributions such as Ubuntu, these dependencies can be
 satisfied with the following:
 
 ```
-sudo apt-get install git gcc g++ python pkg-config libssl-dev libdbus-1-dev \
+sudo apt-get install git gcc g++ pkg-config libssl-dev libdbus-1-dev \
      libglib2.0-dev libavahi-client-dev ninja-build python3-venv python3-dev \
      python3-pip unzip libgirepository1.0-dev libcairo2-dev libreadline-dev
 ```