chore: Remove cvss.proto in containeranalysis from being excluded. (#3213)

The protoc generated files for cvss.proto are outdated for
containeranalysis, we are going to update them in
googleapis/google-cloud-java#11155. This
cvss.proto was exclude before because the whole [v1beta1
version](https://github.com/googleapis/google-cloud-java/blob/main/java-containeranalysis/.OwlBot-hermetic.yaml#L30-L36)
was not configured to be updated.

Co-authored-by: Diego Marquez <[email protected]>

Author: blakeli0

library_generation/generate_library.sh

@@ -237,11 +237,6 @@ case "${proto_path}" in
       proto_files="${proto_files//${removed_proto}/}"
     done
     ;;
-  "google/devtools/containeranalysis/v1beta1"*)
-    # this proto is excluded from //google/devtools/containeranalysis/v1beta1:google-cloud-devtools-containeranalysis-v1beta1-java
-    removed_proto="google/devtools/containeranalysis/v1beta1/cvss/cvss.proto"
-    proto_files="${proto_files//${removed_proto}/}"
-    ;;
 esac
 "$protoc_path"/protoc "--java_out=${temp_destination_path}/java_proto.jar" ${proto_files}
 if [[ "${proto_only}" == "false" ]]; then
@@ -261,9 +256,6 @@ case "${proto_path}" in
       proto_files="${proto_files} ${added_proto}"
     done
     ;;
-  "google/devtools/containeranalysis/v1beta1"*)
-    proto_files="${proto_files} google/devtools/containeranalysis/v1beta1/cvss/cvss.proto"
-    ;;
 esac
 # copy proto files to proto-*/src/main/proto
 for proto_src in ${proto_files}; do