remove outdated comment

Author: sugarmanz

jvm/BUILD

@@ -73,7 +73,6 @@ kt_jvm_library(
     name = "supported_runtimes",
     visibility = ["//visibility:public"],
     exports = [
-        # MARK: Disable GraalJS testing
         "//jvm/graaljs",
         "//jvm/hermes:hermes-host",
         "//jvm/j2v8:j2v8-all",