Remove obsolete comment about labels-crossing-subpackage check happen…

…ing in legacy package loading. It now happens in skyframe package loading.

--
MOS_MIGRATED_REVID=87972524

src/main/java/com/google/devtools/build/lib/skyframe/PackageFunction.java

@@ -282,8 +282,6 @@ private static boolean markDependenciesAndPropagateInconsistentFilesystemExcepti
     }
     packageShouldBeInError = markFileDepsAndPropagateInconsistentFilesystemExceptions(
         pkg.getName(), subincludeFileDepKeys, env, pkg.containsErrors());
-    // Another concern is a subpackage cutting off the subinclude label, but this is already
-    // handled by the legacy package loading code which calls into our SkyframePackageLocator.
 
     // TODO(bazel-team): In the long term, we want to actually resolve the glob patterns within
     // Skyframe. For now, just logging the glob requests provides correct incrementality and