chore: updated prep key script

Author: CloudyPadmal

scripts/prep-key.sh

@@ -2,9 +2,8 @@
 set -e
 
 export DEPLOY_BRANCH=${DEPLOY_BRANCH:-master}
-export DEV_BRANCH=${DEV_BRANCH:-development}
 
-if [ "$TRAVIS_PULL_REQUEST" != "false" -o "$TRAVIS_REPO_SLUG" != "fossasia/pslab-android" ] || ! [ "$TRAVIS_BRANCH" == "$DEPLOY_BRANCH" -o "$TRAVIS_BRANCH" == "$DEV_BRANCH" ]; then
+if [ "$TRAVIS_PULL_REQUEST" != "false" -o "$TRAVIS_REPO_SLUG" != "fossasia/pslab-android" -o "$TRAVIS_BRANCH" != "$DEPLOY_BRANCH" ]; then
     echo "We decrypt key only for pushes to the master branch and not PRs. So, skip."
     exit 0
 fi