Buffs no longer have the "applied" field, it was redundant

Because children of actions are always inactive in the new engine, buffs 
that are children of actions are inactive while buffs elsewhere on the 
character sheet are active, making it redundant to keep the extra field

app/imports/api/engine/actions/applyPropertyByType/applyBuff.js

@@ -15,7 +15,6 @@ export default function applyBuff(node, {creature, targets, scope, log}){
   let buffTargets = prop.target === 'self' ? [creature] : targets;
 
   // Then copy the decendants of the buff to the targets
-  prop.applied = true;
   let propList = [prop];
   function addChildrenToPropList(children){
     children.forEach(child => {

app/imports/api/engine/computation/buildComputation/computeInactiveStatus.js

@@ -19,7 +19,6 @@ export default function computeInactiveStatus(node){
 function isActive(prop){
   if (prop.disabled) return false;
   switch (prop.type){
-    case 'buff': return !!prop.applied;
     case 'item': return !!prop.equipped;
     case 'spell': return !!prop.prepared || !!prop.alwaysPrepared;
     case 'note': return false;

app/imports/api/engine/computation/buildComputation/parseCalculationFields.js

@@ -21,8 +21,9 @@ function discoverInlineCalculationFields(prop, schemas){
       prop._computationDetails.inlineCalculations.push(inlineCalcObj);
       // Extract the calculations and store them on the property
       let string = inlineCalcObj.text;
+      // If there is no text, delete the whole field
       if (!string){
-        delete inlineCalcObj.hash;
+        unset(prop, calcKey);
         return;
       }
       const inlineCalcHash = cyrb53(inlineCalcObj.text);

app/imports/api/engine/computation/buildComputation/tests/computeInactiveStatus.testFn.js

@@ -8,12 +8,6 @@ export default function(){
   const byAncestor = (propId, note) => assertDeactivatedByAncestor(computation, propId, note);
   const active = (propId, note) => assertActive(computation, propId, note);
 
-  // Buffs
-  bySelf('buffNotAppliedId');
-  byAncestor('buffNotAppliedChildId');
-  active('buffAppliedId');
-  active('buffAppliedChildId');
-
   // Items
   active('itemUnequippedId', 'Unequipped items should be active');
   byAncestor('itemUnequippedChildId', 'Children of unequipped items should be inactive');
@@ -53,28 +47,6 @@ function assertActive(computation, propId, note){
 }
 
 var testProperties = [
-  // Buffs
-  clean({
-    _id: 'buffNotAppliedId',
-    type: 'buff',
-    ancestors: [{id: 'charId'}],
-  }),
-  clean({
-    _id: 'buffNotAppliedChildId',
-    type: 'folder',
-    ancestors: [{id: 'charId'}, {id: 'buffNotAppliedId'}],
-  }),
-  clean({
-    _id: 'buffAppliedId',
-    type: 'buff',
-    applied: true,
-    ancestors: [{id: 'charId'}],
-  }),
-  clean({
-    _id: 'buffAppliedChildId',
-    type: 'folder',
-    ancestors: [{id: 'charId'}, {id: 'buffAppliedId'}],
-  }),
   // Items
   clean({
     _id: 'itemUnequippedId',