Feature: Remove jvm-impl choice since Adoptium only offers hotspot impl

warp4j

@@ -37,8 +37,6 @@ function print_help {
     echo '  --windows            create binary for Windows'
     echo '                       if no targets are specified then binaries for'
     echo '                       all targets are created'
-    echo '  --jvm-impl           jvm implementation: hotspot or openj9'
-    echo '                       (default: hotspot)'
     echo '  --jvm-options        <options>'
     echo '                       passed to java like this:'
     echo '                       "java <options> -jar <jar file>";'
@@ -147,10 +145,6 @@ while [[ $# -gt 0 ]]; do
         TARGETS+=($WIN)
         shift
     ;;
-    --jvm-impl)
-        JVM_IMPL="$2"
-        shift 2
-    ;;
     --jvm-options)
         JVM_OPTIONS="$2"
         shift 2
@@ -231,22 +225,13 @@ if [[ $JAVA_VERSION ]] && ! java_version_is_correct $JAVA_VERSION ; then
     fail_with "JDK version \"$JAVA_VERSION\" is not correct"
 fi
 
-JVM_IMPL_HOTSPOT=hotspot
-JVM_IMPL_OPENJ9=openj9
-
-# validate jvm implementation
-if [[ $JVM_IMPL ]] && 
-   [[ $JVM_IMPL != $JVM_IMPL_HOTSPOT ]] &&
-   [[ $JVM_IMPL != $JVM_IMPL_OPENJ9 ]]; then
-    fail_with "jvm implementation \"$JVM_IMPL\" is not correct"
-fi
+JVM_IMPL=hotspot
 
 LATEST_LTS=17 # latest LTS java branch
 
 # default options
 test -z $JAVA_VERSION && JAVA_VERSION=$LATEST_LTS
 test -z $TARGETS && TARGETS=($LIN $MAC $WIN)
-test -z $JVM_IMPL && JVM_IMPL=$JVM_IMPL_HOTSPOT
 
 # returns java branch version
 function get_base_version() {