chore: remove compile protos from post processor (#2134)

* chore: remove compile protos from post processor

Source-Link: googleapis/synthtool@7324804
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-nodejs:latest@sha256:bfe4592953269bfa8d135200ca1b17809f106a337a885d7ecc12cd2a9998e98a

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-nodejs:latest
-  digest: sha256:3ad01f4c6671efb094b43f7d3a3e0b9510bd6501f2e65e874dd525373e29de75
-# created: 2023-08-01T22:29:52.50398591Z
+  digest: sha256:bfe4592953269bfa8d135200ca1b17809f106a337a885d7ecc12cd2a9998e98a
+# created: 2023-11-15T20:00:24.246072277Z