pw_doctor: Don't require bazel

Change-Id: Iad5d059635eda6f05667b899b568e0a784e9959a
Bug: 392
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/47840
Pigweed-Auto-Submit: Rob Mohr <mohrr@google.com>
Reviewed-by: Prashanth Swaminathan <prashanthsw@google.com>
Commit-Queue: Auto-Submit <auto-submit@pigweed.google.com.iam.gserviceaccount.com>

pw_doctor/py/pw_doctor/doctor.py

diff --git a/pw_doctor/py/pw_doctor/doctor.py b/pw_doctor/py/pw_doctor/doctor.py
index 7594616..7889b3b 100755
--- a/pw_doctor/py/pw_doctor/doctor.py
+++ b/pw_doctor/py/pw_doctor/doctor.py
@@ -267,7 +267,6 @@
     # TODO(mohrr) get these tools in CIPD for Windows.
     if os.name == 'posix':
         commands_expected_from_cipd += [
-            'bazel',
             'bloaty',
             'clang++',
         ]