Remove unnecessary else statement
Remove unnecessary else statement

This method could be shortened by using a guard clause instead of a
`if`/`else` statement.

Change-Id: Ic0e2d37e431c3129bf08d0a1afe5abbaeff64e19
Reviewed-on: http://gerrit.causes.com/42344
Tested-by: jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@causes.com>
Reviewed-by: Shane da Silva <67fb7bfe39f841b16a1f86d3928acc568d12c716@brigade.com>

mzp/haml-lint,skateman/haml-lint