Remove multi version stuff

gradle.properties

@@ -2,13 +2,13 @@
 org.gradle.jvmargs=-Xmx1G
 # Fabric Properties
 # check these on https://modmuss50.me/fabric.html
-minecraft_version=1.20.4
-yarn_mappings=1.20.4+build.3
+minecraft_version=1.19.4
+yarn_mappings=1.19.4+build.2
 loader_version=0.15.3
 # Mod Properties
-mod_version=4.0.3-beta.2
+mod_version=4.0.3+1.19.4
 maven_group=dev.louis
 archives_base_name=Nebula
 # Dependencies
 # check this on https://modmuss50.me/fabric.html
-fabric_version=0.91.2+1.20.4
+fabric_version=0.87.2+1.19.4

src/main/java/dev/louis/nebula/NebulaClient.java

@@ -8,13 +8,7 @@
 import net.minecraft.network.PacketByteBuf;
 import net.minecraft.util.Identifier;
 
-import java.lang.reflect.InvocationTargetException;
-import java.util.function.Consumer;
-import java.util.function.Supplier;
-
 public class NebulaClient implements ClientModInitializer {
-    public static final Consumer<PacketByteBuf> retainer = getConsumer("retain", () -> PacketByteBuf::retain);
-    public static final Consumer<PacketByteBuf> releaser = getConsumer("release", () -> PacketByteBuf::release);
 
     @Override
     public void onInitializeClient() {
@@ -30,32 +24,14 @@ private void registerPacketReceivers() {
     }
 
     public static void runSyncWithBuf(MinecraftClient client, PacketByteBuf buf, Runnable runnable) {
-        retainer.accept(buf);
+        buf.retain();
         client.executeSync(() -> {
             runnable.run();
-            releaser.accept(buf);
+            buf.release();
         });
     }
 
     private void registerReceiver(Identifier id, ClientPlayNetworking.PlayChannelHandler playChannelHandler) {
         ClientPlayNetworking.registerGlobalReceiver(id, playChannelHandler);
     }
-
-    private static Consumer<PacketByteBuf> getConsumer(String methodName, Supplier<Consumer<PacketByteBuf>> defaultConsumer) {
-        try {
-            //Needed to throw NoSuchMethodException if the method doesn't exist.
-            PacketByteBuf.class.getMethod(methodName);
-            return buf -> invoke(buf, methodName);
-        } catch (NoSuchMethodException e) {
-            return defaultConsumer.get();
-        }
-    }
-
-    private static void invoke(PacketByteBuf buf, String methodName) {
-        try {
-            PacketByteBuf.class.getMethod(methodName).invoke(buf);
-        } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
-            throw new RuntimeException(e);
-        }
-    }
 }