sync and async: removing all first edition text

Author: getify

sync-async/README.md

@@ -8,11 +8,4 @@
 
 * [Foreword](foreword.md) (by TBA)
 * [Preface](../preface.md)
-* [Chapter 1: Asynchrony: Now & Later](ch1.md)
-* [Chapter 2: Callbacks](ch2.md)
-* [Chapter 3: Promises](ch3.md)
-* [Chapter 4: Generators](ch4.md)
-* [Chapter 5: Program Performance](ch5.md)
-* [Chapter 6: Benchmarking & Tuning](ch6.md)
-* [Appendix A: Library: asynquence](apA.md)
-* [Appendix B: Advanced Async Patterns](apB.md)
+* [Chapter 1: TODO](ch1.md)