Merge "Remove unused -Wno-implicit-function-declaration." into main am: 6f42172021 am: 86ce67cb89

Original change: https://android-review.googlesource.com/c/platform/external/iproute2/+/3352668

Change-Id: Iee0b428c215d79b7cb8e98824873bdc0674afe94
Signed-off-by: Automerger Merge Worker <[email protected]>