prereqs: Remove meson from python requirements
prereqs: Remove meson from python requirements

Nothing in our code base requires meson after opentitan-upstream upleveling at https://sparrow-review.googlesource.com/c/sparrow/3p/lowrisc/opentitan/+/24142

RIP Meson.

Change-Id: I4cf7a6209004b40b4aaa5cafd2d3e6561caa2a62
GitOrigin-RevId: e8a4569da31890674ae18baba16e2e6e61bb97fe

AmbiML/sparrow-scripts-full,AmbiML/sparrow-scripts-full