[roll pigweed] pw_toolchain: Update ARM RBE to new variables

Update the ARM GCC variables in the RBE section of the code
to the new updated ones and remove some unused variables.

Test: None
Original-Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/106330

https://pigweed.googlesource.com/pigweed/pigweed
pigweed Rolled-Commits: 3a90f7e868d8ef7..e6425959d009d5c
Roller-URL: https://ci.chromium.org/b/8806021580696214449
CQ-Do-Not-Cancel-Tryjobs: true
Change-Id: I1f331ffb498c35ce0425caef3253b55c4c55518b
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/zephyr-integration/+/106332
Commit-Queue: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
Bot-Commit: Pigweed Integration Roller <pigweed-integration-roller@pigweed.google.com.iam.gserviceaccount.com>
1 file changed
tree: 674a29fc932cd6215fb069cb0950a3965543144d
  1. .gitmodules
  2. test.sh