Remove dead code from LauncherData. error.no-main-jar-parameter is never used. When --main-jar or --module are missing, jpackage throws ERR_NoEntryPoint from Arguments.validateArguments()

Author: alexeysemenyukoracle

src/jdk.jpackage/share/classes/jdk/jpackage/internal/LauncherData.java

@@ -178,11 +178,6 @@ private static LauncherData createNonModular(
         launcherData.qualifiedClassName = getMainClass(params);
 
         launcherData.mainJarName = getMainJarName(params);
-        if (launcherData.mainJarName == null && launcherData.qualifiedClassName
-                == null) {
-            throw new ConfigException(I18N.getString("error.no-main-jar-parameter"),
-                    null);
-        }
 
         Path mainJarDir = StandardBundlerParam.SOURCE_DIR.fetchFrom(params);
 

src/jdk.jpackage/share/classes/jdk/jpackage/internal/resources/MainResources.properties

@@ -60,7 +60,6 @@ error.main-jar-does-not-exist.advice=The main jar must be specified relative to
 error.no-module-in-path="Failed to find {0} module in module path"
 error.not-path-parameter="Invalid value of {0} parameter: {1}"
 error.no-input-parameter="Missing --input parameter for non modular application"
-error.no-main-jar-parameter="Missing --main-jar parameter for non modular application"
 
 error.no-content-types-for-file-association=No MIME types were specified for File Association number {0}
 error.no-content-types-for-file-association.advice=Specify MIME type for File Association number {0}