Remove linkerconfig from bionic list.

Note that the list is used to install symlinks to com.android.runtime
and also install "bootstrap" copy in subdir.

We don't need bootstrap/linkerconfig since linker itself provides a
default config for those early processes.

This removes both symlink and bootstrap copy from /system.

Bug: 260982509
Bug: 262330207
Test: MicrodroidAppTest
Test: vm run-microdroid
Change-Id: I7c62db96bd3acc91214340d4beed9b561ff6663f