Revert "update bazel registry to a mirror"

This reverts commit 4a2c693.

Author: fhanau

.bazeliskrc

@@ -10,9 +10,6 @@ build --test_size_filters=-enormous
 # corresponds to small,medium,large,enormous tests (medium is default)
 build --test_timeout=3,15,60,240
 
-# Use GitHub mirror for BCR to work around bcr.bazel.build outages
-common --registry=https://raw.githubusercontent.com/bazelbuild/bazel-central-registry/main/
-
 # We're only using bzlmod in a nominal capacity so far
 common --enable_workspace