reduce the public interface for ClientHook

Author: vaci

runtime/src/main/java/org/capnproto/Capability.java

@@ -6,22 +6,14 @@
 public final class Capability {
 
     public static ClientHook newBrokenCap(String reason) {
-        return newBrokenClient(reason, false, BROKEN_CAPABILITY_BRAND);
-    }
-
-    public static ClientHook newBrokenCap(Throwable exc) {
-        return newBrokenClient(exc, false, BROKEN_CAPABILITY_BRAND);
+        return newBrokenClient(BROKEN_CAPABILITY_BRAND);
     }
 
     public static ClientHook newNullCap() {
-        return newBrokenClient(RpcException.failed("Called null capability"), true, NULL_CAPABILITY_BRAND);
-    }
-
-    private static ClientHook newBrokenClient(String reason, boolean resolved, Object brand) {
-        return newBrokenClient(RpcException.failed(reason), resolved, brand);
+        return newBrokenClient(NULL_CAPABILITY_BRAND);
     }
 
-    private static ClientHook newBrokenClient(Throwable exc, boolean resolved, Object brand) {
+    private static ClientHook newBrokenClient(Object brand) {
         return new ClientHook() {
             @Override
             public Object getBrand() {