remove flatMap since it is replaced by flyd.chain

Author: Einar Norðfjörð

examples/drag-and-drop/script.js

@@ -1,5 +1,4 @@
 var flyd = require('flyd');
-var flatMap = require('flyd/module/flatmap');
 var takeUntil = require('flyd/module/takeuntil');
 
 document.addEventListener('DOMContentLoaded', function() {
@@ -13,7 +12,7 @@ document.addEventListener('DOMContentLoaded', function() {
   document.addEventListener('mousemove', mousemove);
   document.addEventListener('mouseup', mouseup);
 
-  var mousedrag = flatMap(function(md) {
+  var mousedrag = flyd.chain(function(md) {
     var startX = md.offsetX, startY = md.offsetY;
 
     return takeUntil(flyd.map(function(mm) {

index.d.ts

@@ -128,16 +128,6 @@ declare module 'flyd/module/filter' {
   export = _Filter;
 }
 
-declare module 'flyd/module/flatmap' {
-  type projection<T, V> = (val: T) => flyd.Stream<V>;
-  interface flatMap {
-    <T, V>(project: projection<T, V>, source: flyd.Stream<T>): flyd.Stream<V>;
-    <T, V>(project: projection<T, V>): (source: flyd.Stream<T>) => flyd.Stream<V>;
-  }
-  const _flatMap: flatMap;
-  export = _flatMap;
-}
-
 declare module 'flyd/module/forwardto' {
   interface ForwardTo {
     <T, V>(stream: flyd.Stream<V>, project: (value: V) => T): flyd.Stream<T>;