rm loading state check that was causing start/end level task chaining…

… problems.

turns out this is both unnecessary and causing new trouble.
the issue here is that the start/end academic level getter chain runs as soon as a new value is set on the given sequence block, causing the in-place editor component from being unloaded instantly, thus aborting the save task chain. madness!

packages/frontend/app/components/curriculum-inventory/sequence-block-overview.hbs

@@ -361,7 +361,7 @@
         </div>
         <div class="block starting-academic-level" data-test-starting-academic-level>
           <label for="academic-level-{{templateId}}">{{t "general.startLevel"}}:</label>
-          {{#if (and @canUpdate this.startingAndEndingAcademicLevelsLoaded)}}
+          {{#if @canUpdate}}
             <EditableField
               @value={{this.startingAcademicLevel.name}}
               @save={{perform this.changeStartingAcademicLevel}}
@@ -386,7 +386,7 @@
         </div>
         <div class="block ending-academic-level" data-test-ending-academic-level>
           <label for="academic-level-{{templateId}}">{{t "general.endLevel"}}:</label>
-          {{#if (and @canUpdate this.startingAndEndingAcademicLevelsLoaded)}}
+          {{#if @canUpdate}}
             <EditableField
               @value={{this.endingAcademicLevel.name}}
               @save={{perform this.changeEndingAcademicLevel}}

packages/frontend/app/components/curriculum-inventory/sequence-block-overview.js

@@ -109,10 +109,6 @@ export default class CurriculumInventorySequenceBlockOverviewComponent extends C
     return this.endingAcademicLevelData.isResolved ? this.endingAcademicLevelData.value : null;
   }
 
-  get startingAndEndingAcademicLevelsLoaded() {
-    return this.startingAcademicLevelData.isResolved && this.endingAcademicLevelData.isResolved;
-  }
-
   @cached
   get courseData() {
     return new TrackedAsyncData(this.args.sequenceBlock.course);