Revert "Update shortcut for remove block in block-deletion test" (#9477)

- Revert shortcut change in block-deletion e2e test
- Remove risk of false positive in block-deletion shortcut test case

test/e2e/specs/block-deletion.test.js

@@ -42,7 +42,9 @@ describe( 'block deletion -', () => {
 
 	describe( 'deleting the third block using the Remove Block shortcut', () => {
 		it( 'results in two remaining blocks and positions the caret at the end of the second block', async () => {
-			await pressWithModifier( [ 'Shift', META_KEY ], 'Backspace' );
+			// Type some text to assert that the shortcut also deletes block content.
+			await page.keyboard.type( 'this is block 2' );
+			await pressWithModifier( [ 'Alt', META_KEY ], 'Backspace' );
 			expect( await getEditedPostContent() ).toMatchSnapshot();
 
 			// Type additional text and assert that caret position is correct by comparing to snapshot.