Just leave the exports there, removing the shebang as they are sourced
and not executed directly.
This has also the side-effect of making dib-lint ignore them, and thus
enforce on them checks which don't make any good in them.
Change-Id: I2a9506634a9b636ca97bd4a1fab72307c95b5388
Partial-Bug: #1435306
f3c2954715