Revert "Add "libc" to soong static_executable targets."

This reverts commit b799ad178fa18c2925a283206496d3f5d6e87f35.
It's no longer needed after https://android-review.googlesource.com/c/329298/

Bug: 34722432
Test: lunch aosp_arm-eng && mmma external/e2fsprogs
Change-Id: I4115fe89ef7751364053223be24e7682e66b6b67
3 files changed