Unnecessary check in replace logic

pointless check in if statement, we've already ascertained
that either there is no object, or that the length is 0 anyway.
Merge pull request #3505 from kingpin2k/removeExtraRemoveLogic

Unnecessary check in replace logic
[BUGFIX release] Fix to return `undefined` for `href` of {{link-to}}

The old IE renders `false` to `href="false"` against my expectation.
Merge pull request #3507 from tricknotes/fix-link-to-helper-for-old-ie

[BUGFIX release] Fix to return `undefined` for `href` of {{link-to}}