remove unnecessary node_modules attribute

Author: mmalerba

tools/highlight-files/BUILD.bazel

@@ -15,7 +15,6 @@ ts_library(
 
 nodejs_binary(
   name = "highlight-files",
-  node_modules = "@npm//:node_modules",
   entry_point = "angular_material/tools/highlight-files/highlight-files.js",
   data = [
     "@npm//highlight.js",