Remove out of bounds reloc from reduced file.

This file was failing to build with asan enabled.  The reason being that
applyFixupFinal was writing 4-bytes worth of fixup in to an atom only
a single byte in length.

The test case didn't actually need this particular reloc so i've removed
it, although i'll follow up with future commits to actually verify that
relocs are to an address with enough space for the fixup to be applied.

llvm-svn: 257906