intercept_write: remove unused CD_USE_PTRACE code.

It is not possible to end up in intercept_write when CD_USE_PTRACE
is set.

src/exec_intercept.c

@@ -872,10 +872,6 @@ intercept_write(int fd, struct intercept_closure *closure)
     closure->len = 0;
     closure->off = 0;
 
-    if (ISSET(closure->details->flags, CD_USE_PTRACE)) {
-	/* Ready for the next policy check from the tracer. */
-	closure->state = RECV_POLICY_CHECK;
-    } else {
     switch (closure->state) {
     case RECV_HELLO_INITIAL:
 	/* Re-use event for the listener. */
@@ -904,7 +900,6 @@ intercept_write(int fd, struct intercept_closure *closure)
 	/* Done with this connection. */
 	intercept_connection_close(closure);
     }
-    }
 
     ret = true;