build_packages: drop python2 forcing w/goma

It should work with Python 3 now.

BUG=chromium:1007384
TEST=CQ passes

Change-Id: I25585be8ef49c957b1c844875557eb30825dd6fb
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/2065314
Reviewed-by: Michael Mortensen <mmortensen@google.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/build_packages b/build_packages
index eb8c876..149b3a3 100755
--- a/build_packages
+++ b/build_packages
@@ -372,9 +372,8 @@
   if [[ "${FLAGS_run_goma}" -eq "${FLAGS_TRUE}" ]]; then
     info "Starting goma compiler_proxy."
     goma_ctl="${GOMA_DIR:-${HOME}/goma}/goma_ctl.py"
-    # TODO(crbug.com/1007384): Stop forcing Python 2.
-    EPYTHON="python2" "${goma_ctl}" restart
-    trap "EPYTHON=python2 '${goma_ctl}' stop" EXIT
+    "${goma_ctl}" restart
+    trap "'${goma_ctl}' stop" EXIT
   fi
 
   sudo -E "${EMERGE_CMD[@]}" "${EMERGE_FLAGS[@]}" "${PACKAGES[@]}"