Cleaned up code around 1.8 play state compression handling

Author: RaphiMC

src/main/java/net/raphimc/viaproxy/protocoltranslator/impl/ViaProxyPlatformLoader.java

@@ -38,8 +38,8 @@ public class ViaProxyPlatformLoader implements ViaPlatformLoader {
     @Override
     public void load() {
         // ViaVersion
-        Via.getManager().getProviders().use(CompressionProvider.class, new ViaProxyCompressionProvider());
         Via.getManager().getProviders().use(VersionProvider.class, new ViaProxyVersionProvider());
+        Via.getManager().getProviders().use(CompressionProvider.class, new ViaProxyCompressionProvider());
 
         // ViaBackwards
         Via.getManager().getProviders().use(TransferProvider.class, new ViaProxyTransferProvider());

src/main/java/net/raphimc/viaproxy/protocoltranslator/providers/ViaProxyCompressionProvider.java

@@ -24,10 +24,7 @@
 public class ViaProxyCompressionProvider extends CompressionProvider {
 
     @Override
-    public void handlePlayCompression(UserConnection user, int threshold) {
-        if (!user.isClientSide()) {
-            throw new IllegalStateException("PLAY state Compression packet is unsupported");
-        }
+    public void handlePlayCompression(final UserConnection user, final int threshold) {
         user.getChannel().attr(MCPipeline.COMPRESSION_THRESHOLD_ATTRIBUTE_KEY).set(threshold);
     }