refactor(test): reuse existing rollback.txt golden file

Remove duplicate rollback-with-description.txt fixture that had
identical content to rollback.txt.

Signed-off-by: MrJack <36191829+biagiopietro@users.noreply.github.com>

pkg/cmd/rollback_test.go

@@ -84,7 +84,7 @@ func TestRollbackCmd(t *testing.T) {
 	}, {
 		name:   "rollback a release with description",
 		cmd:    "rollback funny-honey 1 --description 'Reverting due to bug in version 2'",
-		golden: "output/rollback-with-description.txt",
+		golden: "output/rollback.txt",
 		rels:   rels,
 	}}
 	runTestCmd(t, tests)

pkg/cmd/testdata/output/rollback-with-description.txt

@@ -1 +0,0 @@
-Rollback was a success! Happy Helming!