message: Remove gflags specific warning suppression.
  We're not importing gflags anymore.
diff: @@ -66,10 +66,7 @@ BAZEL_OPTS="${BAZEL_OPTS} --cxxopt=-Wno-deprecated-declarations"
  # tight warnings on for 'our' code-base.
  # TODO(hzeller): Remove after
  # https://github.com/chipsalliance/verible/issues/747 is figured out
  -# This option is only recognized by gcc
  -if [[ ! "${CXX}" == clang* ]]; then
  - BAZEL_OPTS="${BAZEL_OPTS} --cxxopt=-Wno-cast-function-type" # gflags
  -else
  +if [[ "${CXX}" == clang* ]]; then
  # -- only recognized by clang
  # Don't rely on implicit template type deduction
  BAZEL_OPTS="${BAZEL_OPTS} --cxxopt=-Wctad-maybe-unsupported"
  