Remove alternative text if there are none

Julien LepillerSun Jul 18 19:26:41+0200 2021

86470b7

nani/app/fastlane/metadata/android/en-US/images
namelast commitdate
featureGraphic.pngAdd images for fdroid pageSat Jun 06 00:15:05+0200 2020
phoneScreenshots/Update screenshotsThu Jun 11 04:21:54+0200 2020