Don't bind-mount bionic files

Bind-mounting of the bionic files on /bionic/* paths no longer required
as there are direct symlinks from bionic files in /system partition to
the corresponding bionic files in the runtime APEX. e.g.,

/system/lib/libc.so -> /apex/com.android.runtime/lib/bionic/libc.so

Bug: 125549215
Test: m; devices boots
Change-Id: I4a43101c3e3e2e14a81001d6d65a8a4b727df385