6 files declare their use of TermStorageInterface in Drupal 8

ForumController.php in core/modules/forum/src/Controller/ForumController.php

ForumListingBreadcrumbBuilderTest.php in core/modules/forum/tests/src/Unit/Breadcrumb/ForumListingBreadcrumbBuilderTest.php

ForumNodeBreadcrumbBuilderTest.php in core/modules/forum/tests/src/Unit/Breadcrumb/ForumNodeBreadcrumbBuilderTest.php

TaxonomyIndexTid.php in core/modules/taxonomy/src/Plugin/views/filter/TaxonomyIndexTid.php

TaxonomyTermHierarchyConstraintValidator.php in core/modules/taxonomy/src/Plugin/Validation/Constraint/TaxonomyTermHierarchyConstraintValidator.php

VocabularyResetForm.php in core/modules/taxonomy/src/Form/VocabularyResetForm.php