Issue #145 remove dead code and stale docs from backport

- Delete unannotated dead TestJsonLiteral.conversionTest() (upstream-faithful;
  assertions already covered by live booleanOfTest())
- Wire ReadmeExamples into ReadmeExamplesTest so the README.md and index.html
  promise of a runnable examples class is test-enforced (exp_tests 1675 -> 1676)
- ApiTracker: delete unreachable NOT_IMPLEMENTED/PARSE_NOT_IMPLEMENTED status
  path (nothing produces that status) and fix discoverLocalJsonClasses javadoc
  to match the actual packages list
- ApiTrackerRunner: delete parsed-but-ignored binary|source mode and sourcepath
  args; both workflows invoke with only the log level argument
- LazyConstant: drop stale comment referencing the removed StableValue polyfill
- Remove 15 unused imports across jtd, jtd-codegen, jsonpath and compatibility
  suite sources
- Delete 8 stray pom.xml.versionsBackup files (untracked; .gitignore already
  covers the pattern)

Verify: mvnd clean verify green; surefire totals tests=1676 failures=0
errors=0 skipped=0.

Author: simbo1905

.github/workflows/ci.yml

@@ -39,7 +39,7 @@ jobs:
                       for k in totals: totals[k]+=int(r.get(k,'0'))
                   except Exception:
                       pass
-          exp_tests=1675
+          exp_tests=1676
           exp_skipped=0
           if totals['tests']!=exp_tests or totals['skipped']!=exp_skipped:
               print(f"Unexpected test totals: {totals} != expected tests={exp_tests}, skipped={exp_skipped}")

json-compatibility-suite/src/test/java/jdk/incubator/compatibility/DownloadVerificationTest.java

@@ -1,7 +1,6 @@
 package jdk.incubator.compatibility;
 
 import org.junit.jupiter.api.Test;
-import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import static org.assertj.core.api.Assertions.assertThat;

json-java21-api-tracker/src/main/java/io/github/simbo1905/tracker/ApiTracker.java

@@ -97,7 +97,7 @@ static String fetchFromUrl(String url) {
     }
 
     /// Discovers all classes in the local JSON API packages
-    /// @return sorted set of classes from jdk.incubator.java.util.json and jdk.incubator.internal.util.json
+    /// @return sorted set of classes from jdk.incubator.java.util.json
     static Set<Class<?>> discoverLocalJsonClasses() {
         LOGGER.info("Starting class discovery for JSON API packages");
         final var classes = new TreeSet<Class<?>>(Comparator.comparing(Class::getName));
@@ -610,15 +610,6 @@ static JsonObject compareApis(JsonObject local, JsonObject upstream) {
             return JsonObject.of(diffMap);
         }
 
-        // Check if status is NOT_IMPLEMENTED (from parsing)
-        if (upstream.asMap().containsKey("status")) {
-            final var status = ((JsonString) upstream.asMap().get("status")).asString();
-            if ("NOT_IMPLEMENTED".equals(status)) {
-                diffMap.put("status", JsonString.of("PARSE_NOT_IMPLEMENTED"));
-                return JsonObject.of(diffMap);
-            }
-        }
-
         // Perform detailed comparison
         final var differences = new ArrayList<JsonValue>();
         var hasChanges = false;

json-java21-api-tracker/src/main/java/io/github/simbo1905/tracker/ApiTrackerRunner.java

@@ -11,32 +11,22 @@
 
 /// Command-line runner for the API Tracker
 ///
-/// Usage: java io.github.simbo1905.tracker.ApiTrackerRunner [loglevel] [mode] [sourcepath]
+/// Usage: java io.github.simbo1905.tracker.ApiTrackerRunner [loglevel]
 ///
 /// Arguments:
 /// - loglevel: SEVERE, WARNING, INFO, FINE, FINER, FINEST (default: INFO)
-/// - mode: binary|source (default: binary)
-///   - binary: Compare binary reflection (local) vs source parsing (remote)
-///   - source: Compare source parsing (local) vs source parsing (remote) for accurate parameter names
-/// - sourcepath: Path to local source files (required for source mode)
 @SuppressWarnings("JavadocReference")
 public class ApiTrackerRunner {
 
   public static void main(String[] args) {
     // Parse command line arguments
     final var logLevel = args.length > 0 ? Level.parse(args[0].toUpperCase()) : Level.INFO;
-    final var mode = args.length > 1 ? args[1].toLowerCase() : "binary";
-    final var sourcePath = args.length > 2 ? args[2] : null;
 
     configureLogging(logLevel);
 
     System.out.println("=== JSON API Tracker ===");
     System.out.println("Comparing local jdk.incubator.java.util.json with upstream jdk.incubator.json");
     System.out.println("Log level: " + logLevel);
-    System.out.println("Mode: " + mode);
-    if (sourcePath != null) {
-      System.out.println("Local source path: " + sourcePath);
-    }
     System.out.println();
 
     try {

json-java21-jsonpath/src/test/java/json/java21/jsonpath/JsonPathParserTest.java

@@ -1,7 +1,5 @@
 package json.java21.jsonpath;
 
-import jdk.incubator.java.util.json.Json;
-import jdk.incubator.java.util.json.JsonValue;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.ValueSource;

json-java21-jtd-codegen/src/main/java/json/java21/jtd/codegen/EmitDiscriminator.java

@@ -2,7 +2,6 @@
 
 import java.lang.classfile.CodeBuilder;
 import java.lang.classfile.TypeKind;
-import java.lang.constant.ConstantDescs;
 
 import json.java21.jtd.JtdSchema;
 

json-java21-jtd-codegen/src/main/java/json/java21/jtd/codegen/EmitNode.java

@@ -2,7 +2,6 @@
 
 import java.lang.classfile.CodeBuilder;
 import java.lang.classfile.TypeKind;
-import java.lang.constant.ConstantDescs;
 import java.util.logging.Logger;
 
 import json.java21.jtd.JtdSchema;

json-java21-jtd-codegen/src/main/java/json/java21/jtd/codegen/EmitType.java

@@ -2,7 +2,6 @@
 
 import java.lang.classfile.CodeBuilder;
 import java.lang.classfile.TypeKind;
-import java.lang.constant.ConstantDescs;
 
 import static json.java21.jtd.codegen.Descriptors.*;
 

json-java21-jtd-codegen/src/main/java/json/java21/jtd/codegen/JtdCodegen.java

@@ -3,8 +3,6 @@
 import java.lang.classfile.*;
 import java.lang.classfile.attribute.SourceFileAttribute;
 import java.lang.constant.ClassDesc;
-import java.lang.constant.ConstantDescs;
-import java.lang.constant.MethodTypeDesc;
 import java.lang.invoke.MethodHandles;
 import java.util.concurrent.atomic.AtomicLong;
 import java.util.logging.Logger;

json-java21-jtd/src/test/java/json/java21/jtd/JtdSpecConformanceTest.java

@@ -12,7 +12,6 @@
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
 import java.util.Comparator;
-import java.util.List;
 import java.util.stream.Stream;
 
 import static org.assertj.core.api.Assertions.assertThat;