diff --git a/core/modules/taxonomy/src/Entity/Vocabulary.php b/core/modules/taxonomy/src/Entity/Vocabulary.php
index 01ba59f..9f6aa3d 100644
--- a/core/modules/taxonomy/src/Entity/Vocabulary.php
+++ b/core/modules/taxonomy/src/Entity/Vocabulary.php
@@ -132,14 +132,6 @@ public function getWeight() {
   /**
    * {@inheritdoc}
    */
-  public function setWeight($weight) {
-    $this->set('weight', $weight);
-    return $this;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
   public function postSave(EntityStorageInterface $storage, $update = TRUE) {
     parent::postSave($storage, $update);
 
diff --git a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyVocabularyTest.php b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyVocabularyTest.php
index 6cbbce1..59e8137 100644
--- a/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyVocabularyTest.php
+++ b/core/modules/taxonomy/src/Tests/Migrate/d6/MigrateTaxonomyVocabularyTest.php
@@ -43,13 +43,13 @@ public function testTaxonomyVocabulary() {
       $this->assertIdentical("vocabulary $j (i=$i)", $vocabulary->label());
       $this->assertIdentical("description of vocabulary $j (i=$i)", $vocabulary->getDescription());
       $this->assertIdentical($i, $vocabulary->getHierarchy());
-      $this->assertIdentical(4 + $i, $vocabulary->get('weight'));
+      $this->assertIdentical(4 + $i, $vocabulary->getWeight());
     }
     $vocabulary = Vocabulary::load('vocabulary_name_much_longer_than');
     $this->assertIdentical('vocabulary name much longer than thirty two characters', $vocabulary->label());
     $this->assertIdentical('description of vocabulary name much longer than thirty two characters', $vocabulary->getDescription());
     $this->assertIdentical(3, $vocabulary->getHierarchy());
-    $this->assertIdentical(7, $vocabulary->get('weight'));
+    $this->assertIdentical(7, $vocabulary->getWeight());
   }
 
 }
diff --git a/core/modules/taxonomy/src/Tests/VocabularyUiTest.php b/core/modules/taxonomy/src/Tests/VocabularyUiTest.php
index 029e99d..4f564ac 100644
--- a/core/modules/taxonomy/src/Tests/VocabularyUiTest.php
+++ b/core/modules/taxonomy/src/Tests/VocabularyUiTest.php
@@ -94,7 +94,7 @@ function testTaxonomyAdminChangingWeights() {
     $vocabularies = Vocabulary::loadMultiple();
     $edit = array();
     foreach ($vocabularies as $key => $vocabulary) {
-      $weight = -$vocabulary->get('weight');
+      $weight = -$vocabulary->getWeight();
       $vocabularies[$key]->set('weight', $weight);
       $edit['vocabularies[' . $key . '][weight]'] = $weight;
     }
diff --git a/core/modules/taxonomy/src/VocabularyInterface.php b/core/modules/taxonomy/src/VocabularyInterface.php
index c917d96..557457f 100644
--- a/core/modules/taxonomy/src/VocabularyInterface.php
+++ b/core/modules/taxonomy/src/VocabularyInterface.php
@@ -45,16 +45,6 @@ public function setHierarchy($hierarchy);
   public function getWeight();
 
   /**
-   * Gets the weight of vocabulary.
-   *
-   * @param int $weight
-   *   The vocabulary weight.
-   *
-   * @return $this
-   */
-  public function setWeight($weight);
-
-  /**
    * Returns the vocabulary description.
    *
    * @return string