Replace erroneous usage of unsData method

Author: t-richards

app/code/Magento/GroupedProduct/Model/Product/Type/Grouped.php

@@ -236,7 +236,7 @@ public function getAssociatedProducts($product)
      */
     public function flushAssociatedProductsCache($product)
     {
-        return $product->unsData($this->_keyAssociatedProducts);
+        return $product->unsetData($this->_keyAssociatedProducts);
     }
 
     /**

app/code/Magento/GroupedProduct/Test/Unit/Model/Product/Type/GroupedTest.php

@@ -611,9 +611,9 @@ public function testPrepareForCartAdvancedZeroQty()
 
     public function testFlushAssociatedProductsCache()
     {
-        $productMock = $this->createPartialMock(\Magento\Catalog\Model\Product::class, ['unsData']);
+        $productMock = $this->createPartialMock(\Magento\Catalog\Model\Product::class, ['unsetData']);
         $productMock->expects($this->once())
-            ->method('unsData')
+            ->method('unsetData')
             ->with('_cache_instance_associated_products')
             ->willReturnSelf();
         $this->assertEquals($productMock, $this->_model->flushAssociatedProductsCache($productMock));

app/code/Magento/Reports/Model/Product/Index/AbstractIndex.php

@@ -252,7 +252,7 @@ public function clean()
     public function registerIds($productIds)
     {
         $this->_getResource()->registerIds($this, $productIds);
-        $this->_getSession()->unsData($this->_countCacheKey);
+        $this->_getSession()->unsetData($this->_countCacheKey);
         return $this;
     }
 }

dev/tests/integration/testsuite/Magento/Newsletter/Controller/ManageTest.php

@@ -40,7 +40,7 @@ protected function setUp()
     protected function tearDown()
     {
         $this->customerSession->setCustomerId(null);
-        $this->coreSession->unsData('_form_key');
+        $this->coreSession->unsetData('_form_key');
     }
 
     /**