Remove unused method

test/profile.test.ts

@@ -38,5 +38,16 @@ describe("OnePassword", () => {
     });
   });
 
-  describe("lock", () => {});
+  describe("lock", () => {
+    it("locks", async () => {
+      const instance = new OnePassword({ path: freddy });
+      const vault = await instance.getProfile("default");
+      vault.unlock("freddy");
+      expect(vault.isLocked).to.be.false;
+
+      vault.lock();
+      expect(vault.isLocked).to.be.true;
+      expect(() => vault.overviews.values()).to.throw();
+    });
+  });
 });