fix(linux): Remove cosmic distribution

18.10 was end-of-life July 18, 2019 and launchpad is rejecting any further package updates for that version.

(cherry picked from commit bdd1244860)

linux/.pbuilderrc

@@ -14,7 +14,7 @@ DEBIAN_SUITES=($UNSTABLE_CODENAME $TESTING_CODENAME $STABLE_CODENAME $STABLE_BAC
     "experimental" "unstable" "testing" "stable")
 
 # List of Ubuntu suites. Update these when needed.
-UBUNTU_SUITES=("disco", "cosmic" "bionic" "xenial" "trusty")
+UBUNTU_SUITES=("disco" "bionic" "xenial" "trusty")
 
 # Mirrors to use. Update these to your preferred mirror.
 DEBIAN_MIRROR="deb.debian.org"

linux/scripts/cow.sh

@@ -3,7 +3,7 @@
 # If needed set cowbuilder up for building Keyman Debian packages
 # Then cowbuilder update
 
-distributions='disco cosmic bionic xenial'
+distributions='disco bionic xenial'
 
 dpkgcheck=`dpkg-query -l cowbuilder`
 if [ $? != 0 ]; then

linux/scripts/launchpad.sh

@@ -45,7 +45,7 @@ fi
 if [ "${DIST}" != "" ]; then
     distributions="${DIST}"
 else
-    distributions="xenial bionic cosmic disco"
+    distributions="xenial bionic disco"
 fi
 
 if [ "${PACKAGEVERSION}" != "" ]; then