scripts(setup-ubuntu): Remove jdk 8 and 18

Having the LTS JDK 17 seems to be enough.

This shaves away 600 MB from the docker image size.

scripts/properties.sh

@@ -18,7 +18,7 @@ TERMUX_NDK_VERSION=$TERMUX_NDK_VERSION_NUM$TERMUX_NDK_REVISION
 # and update SHA256 sums in scripts/setup-android-sdk.sh
 # check all packages build and run correctly and bump if needed
 
-: "${TERMUX_JAVA_HOME:=/usr/lib/jvm/java-8-openjdk-amd64}"
+: "${TERMUX_JAVA_HOME:=/usr/lib/jvm/java-17-openjdk-amd64}"
 export JAVA_HOME=${TERMUX_JAVA_HOME}
 
 if [ "${TERMUX_PACKAGES_OFFLINE-false}" = "true" ]; then

scripts/setup-ubuntu.sh

@@ -174,9 +174,6 @@ PACKAGES+=" luajit"
 # Needed by libduktape
 PACKAGES+=" bc"
 
-# Java.
-PACKAGES+=" openjdk-8-jdk openjdk-18-jdk"
-
 # needed by ovmf
 PACKAGES+=" libarchive-tools"