remove JExtractPluginSampleApp because SwiftKitSampleApp covers it all

Author: ktoso

Samples/JExtractPluginSampleApp/.gitignore

@@ -147,6 +147,7 @@ application {
 
 jmh {
     jvmArgsAppend = [
+        "--enable-native-access=ALL-UNNAMED",
         "-Djava.library.path=" +
                 (BuildUtils.javaLibraryPaths(rootDir) +
                  BuildUtils.javaLibraryPaths(project.projectDir)).join(":"),