[LLD][ELF] - Remove the excessive safety return. NFC.
[LLD][ELF] - Remove the excessive safety return. NFC.

We explicitly call finalizeContents() only once for
DynamicSection. The code testing we do not do it twice is
just excessive.

It could be an assert, but we don't do
that for other sections, so does not seem we
should do it here too.

git-svn-id: f6089bf0e6284f307027cef4f64114ee9ebb0424@347543 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/lld,llvm-mirror/lld