gn2bp: Remove redundant `blueprint.add_module`

* This is already called in `create_action_module`. JniGenerator_Java will be added again in an upcoming CL.

[I think create_action_module shouldn't call that in the first place.]

Test: update_results.sh
Change-Id: I409fb37a135c2249f777d47b97c1565552d2b7ab
2 files changed