remove unnecessary apt install of numpy that appear to be causing http://b/260016282 (#1583)
remove unnecessary apt install of numpy that appear to be causing http://b/260016282 (#1583)

Manually tested by merging this change in my fork of tflite-micro and
confirmed that the bazel job goes past the install stage with this
change (and fails without it).

We will need to merge this change before it can have an effect on the
tflite-micro repo and that will be done by ignoring the branch
protection rules (administrator only).

BUG=http://b/260016282
tensorflow/tflite-micro,tensorflow/tflite-micro,tensorflow/tflite-micro,tensorflow/tflite-micro