pw_env_setup: Remove "Pigweed" name from bootstrap
pw_env_setup: Remove "Pigweed" name from bootstrap

This removes the "Pigweed" name from one of the bootstrap steps to
better facilitate re-branding Pigweed.

Change-Id: I813b032f61d9a14c33f141c53ac0956933f7a13d

google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed,google/pigweed