Stop setting accept_ra, now that netd does it.
Stop setting accept_ra, now that netd does it.

Bug: 8276725
Change-Id: Iedbd34bc94f678afe51429078e6c06ff144e6373

VanirAOSP/external_android-clat,geekboxzone/mmallow_external_android-clat,MyAOSP/external_android-clat,geekboxzone/mmallow_external_android-clat,xin3liang/platform_external_android-clat,CyanogenMod/android_external_android-clat,thiz11/platform_external_android-clat,TeamExodus/external_android-clat,thiz11/platform_external_android-clat,geekboxzone/lollipop_external_android-clat,Omegaphora/external_android-clat,IllusionRom-deprecated/android_platform_external_android-clat,geekboxzone/lollipop_external_android-clat,jsnweitzel/android_external_android-clat,TeamExodus/external_android-clat,android-ia/platform_external_android-clat,android-ia/platform_external_android-clat,jsnweitzel/android_external_android-clat,MyAOSP/external_android-clat,CyanogenMod/android_external_android-clat,xin3liang/platform_external_android-clat,yinquan529/platform-external-android-clat,yinquan529/platform-external-android-clat,Omegaphora/external_android-clat