Disable RunPythonTests on rtc_tools.
Disable RunPythonTests on rtc_tools.

The only python test present in that folder has been removed by
https://webrtc-review.googlesource.com/c/src/+/146941.

TBR=tommi@webrtc.org

No-Try: True
Bug: None
Change-Id: Idb03c3b8acceae04ebbf5bb0d8db7cd3288b929d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/148074
Commit-Queue: Mirko Bonadei <d2c43c210eae6feef04f53bae50885e8152edcca@webrtc.org>
Reviewed-by: Artem Titov <1e27363ccc366a7ff0fdde48204d68d5ebfeccc5@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#28775}

ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc