Breaking Change: Remove obsolete runtime internalBuildGeneratedFileFr…

…om which was for backwards compatibility with old gencode.

Remove `sentinel.proto` and references to it.

This was announced in https://protobuf.dev/news/2023-12-05/ per our Cross-Version Runtime Guarantees: https://protobuf.dev/support/cross-version-runtime-guarantee/

PiperOrigin-RevId: 597849821

java/core/src/main/java/com/google/protobuf/Descriptors.java

@@ -360,50 +360,6 @@ private static FileDescriptor[] findDescriptors(
       return descriptors.toArray(new FileDescriptor[0]);
     }
 
-    /**
-     * This method is for backward compatibility with generated code which passed an
-     * InternalDescriptorAssigner.
-     */
-    @Deprecated
-    public static void internalBuildGeneratedFileFrom(
-        final String[] descriptorDataParts,
-        final FileDescriptor[] dependencies,
-        final InternalDescriptorAssigner descriptorAssigner) {
-      final byte[] descriptorBytes = latin1Cat(descriptorDataParts);
-
-      FileDescriptorProto proto;
-      try {
-        proto = FileDescriptorProto.parseFrom(descriptorBytes);
-      } catch (InvalidProtocolBufferException e) {
-        throw new IllegalArgumentException(
-            "Failed to parse protocol buffer descriptor for generated code.", e);
-      }
-
-      final FileDescriptor result;
-      try {
-        // When building descriptors for generated code, we allow unknown
-        // dependencies by default.
-        result = buildFrom(proto, dependencies, true);
-      } catch (DescriptorValidationException e) {
-        throw new IllegalArgumentException(
-            "Invalid embedded descriptor for \"" + proto.getName() + "\".", e);
-      }
-
-      final ExtensionRegistry registry = descriptorAssigner.assignDescriptors(result);
-
-      if (registry != null) {
-        // We must re-parse the proto using the registry.
-        try {
-          proto = FileDescriptorProto.parseFrom(descriptorBytes, registry);
-        } catch (InvalidProtocolBufferException e) {
-          throw new IllegalArgumentException(
-              "Failed to parse protocol buffer descriptor for generated code.", e);
-        }
-
-        result.setProto(proto);
-      }
-    }
-
     /**
      * This method is to be called by generated code only. It is equivalent to {@code buildFrom}
      * except that the {@code FileDescriptorProto} is encoded in protocol buffer wire format.
@@ -430,22 +386,6 @@ public static FileDescriptor internalBuildGeneratedFileFrom(
       }
     }
 
-    /**
-     * This method is for backward compatibility with generated code which passed an
-     * InternalDescriptorAssigner.
-     */
-    @Deprecated
-    public static void internalBuildGeneratedFileFrom(
-        final String[] descriptorDataParts,
-        final Class<?> descriptorOuterClass,
-        final String[] dependencyClassNames,
-        final String[] dependencyFileNames,
-        final InternalDescriptorAssigner descriptorAssigner) {
-      FileDescriptor[] dependencies =
-          findDescriptors(descriptorOuterClass, dependencyClassNames, dependencyFileNames);
-      internalBuildGeneratedFileFrom(descriptorDataParts, dependencies, descriptorAssigner);
-    }
-
     /**
      * This method is to be called by generated code only. It uses Java reflection to load the
      * dependencies' descriptors.
@@ -2011,6 +1951,7 @@ private void setProto(final EnumDescriptorProto proto) {
    * number. In generated Java code, all values with the same number after the first become aliases
    * of the first. However, they still have independent EnumValueDescriptors.
    */
+  @SuppressWarnings("ShouldNotSubclass")
   public static final class EnumValueDescriptor extends GenericDescriptor
       implements Internal.EnumLite {
     static final Comparator<EnumValueDescriptor> BY_NUMBER =

ruby/src/main/java/BUILD.bazel

@@ -1,6 +1,5 @@
-load("@rules_java//java:defs.bzl", "java_library", "java_lite_proto_library", "java_proto_library")
+load("@rules_java//java:defs.bzl", "java_library")
 load("@rules_pkg//:mappings.bzl", "pkg_files", "strip_prefix")
-load("@rules_proto//proto:defs.bzl", "proto_library")
 
 java_library(
     name = "protobuf_java",
@@ -21,21 +20,10 @@ java_library(
     ],
 )
 
-proto_library(
-    name = "sentinel_proto",
-    srcs = ["sentinel.proto"],
-)
-
-java_proto_library(
-    name = "sentinel_java_proto",
-    deps = [":sentinel_proto"],
-)
-
 pkg_files(
     name = "dist_files",
     srcs = glob([
         "**/*.java",
-        "**/*.proto",
     ]),
     strip_prefix = strip_prefix.from_root(""),
     visibility = ["//ruby:__pkg__"],

ruby/src/main/java/com/google/protobuf/jruby/RubyRepeatedField.java

@@ -400,35 +400,30 @@ protected int size() {
   }
 
   private IRubyObject defaultValue(ThreadContext context) {
-    SentinelOuterClass.Sentinel sentinel = SentinelOuterClass.Sentinel.getDefaultInstance();
     Object value;
     switch (fieldType) {
       case INT32:
-        value = sentinel.getDefaultInt32();
-        break;
-      case INT64:
-        value = sentinel.getDefaultInt64();
-        break;
       case UINT32:
-        value = sentinel.getDefaultUnit32();
+        value = 0;
         break;
+      case INT64:
       case UINT64:
-        value = sentinel.getDefaultUint64();
+        value = 0L;
         break;
       case FLOAT:
-        value = sentinel.getDefaultFloat();
+        value = 0F;
         break;
       case DOUBLE:
-        value = sentinel.getDefaultDouble();
+        value = 0D;
         break;
       case BOOL:
-        value = sentinel.getDefaultBool();
+        value = false;
         break;
       case BYTES:
-        value = sentinel.getDefaultBytes();
+        value = com.google.protobuf.ByteString.EMPTY;
         break;
       case STRING:
-        value = sentinel.getDefaultString();
+        value = "";
         break;
       case ENUM:
         IRubyObject defaultEnumLoc = context.runtime.newFixnum(0);