reverted variadic input caching experiment

HISTORY.md

@@ -10,6 +10,7 @@
 ### 2020-12-17
 * blocks: added hook for caching variadic inputs
 * blocks: refactored blockSequence() non-recursively
+* reverted variadic input caching experiment
 
 ### 2020-12-16
 * threads, objects: added dev debugging hook for counting yields

src/blocks.js

@@ -11403,10 +11403,6 @@ MultiArgMorph.prototype = new ArgMorph();
 MultiArgMorph.prototype.constructor = MultiArgMorph;
 MultiArgMorph.uber = ArgMorph.prototype;
 
-// MultiArgMorph preferences settings:
-
-// MultiArgMorph.prototype.isCachingInputs = true; // commented out for now
-
 // MultiArgMorph instance creation:
 
 function MultiArgMorph(
@@ -11525,7 +11521,6 @@ MultiArgMorph.prototype.setContents = function (anArray) {
             inputs[i].setContents(anArray[i]);
         }
     }
-    this.cachedInputs = null;
 };
 
 // MultiArgMorph hiding and showing:
@@ -11686,7 +11681,6 @@ MultiArgMorph.prototype.addInput = function (contents) {
     this.children.splice(idx, 0, newPart);
     newPart.fixLayout();
     this.fixLayout();
-    this.cachedInputs = null;
     return newPart;
 };
 
@@ -11704,7 +11698,6 @@ MultiArgMorph.prototype.removeInput = function () {
         }
     }
     this.fixLayout();
-    this.cachedInputs = null;
 };
 
 MultiArgMorph.prototype.is3ArgRingInHOF = function () {