travis: remove duplicate xcode image and add comments
authorSitsofe Wheeler <sitsofe@yahoo.com>
Sat, 5 Oct 2019 13:36:48 +0000 (14:36 +0100)
committerSitsofe Wheeler <sitsofe@yahoo.com>
Sat, 21 Dec 2019 11:50:19 +0000 (11:50 +0000)
commit7891b2a4dcd891c826c6c789dede5544b253d396
tree0756f380791b18ab55c0ff01d77691eb5a34cab3
parent8d853d0bbf4487af9445f7253c1951970ce75200
travis: remove duplicate xcode image and add comments

We already build on whatever the default Travis xcode image is
which is currently 9.4 so remove the duplicate build targeting 9.4 and
add some comments explaining the purpose of the different builds.

Signed-off-by: Sitsofe Wheeler <sitsofe@yahoo.com>
.travis.yml