libbinder_ndk: remove init_map.sh

We can no longer automatically generate the mapping file from source.
Now that libbinder_ndk is no longer in its initially development, future
changes require specific modifications to the mapping file.

Bug: 136027762
Test: ./update.sh
Change-Id: I3e5b351472658a56e36b10233bf91d6a81902013
2 files changed