Remove unnecessary dependencies from the example MODULE.bazel

Author: reutermj

examples/hello_world/MODULE.bazel

@@ -1,8 +1,6 @@
 module(name = "hello_world_test")
 
 bazel_dep(name = "rules_cc", version = "0.1.1")
-bazel_dep(name = "bazel_skylib", version = "1.7.1")
-bazel_dep(name = "platforms", version = "0.0.11")
 bazel_dep(name = "toolchains_cc")
 local_path_override(
     module_name = "toolchains_cc",