Update BUILD

Author: Yannic

src/main/java/com/google/devtools/build/lib/buildeventstream/proto/BUILD

@@ -30,7 +30,6 @@ proto_library(
         "//src/main/protobuf:critical_path_proto",
         "//src/main/protobuf:failure_details_proto",
         "//src/main/protobuf:invocation_policy_proto",
-        "//src/main/protobuf:spawn_proto",
         "@com_google_protobuf//:duration_proto",
         "@com_google_protobuf//:timestamp_proto",
     ],