Fix BUILD and remove .vscode/settings.json

Author: jaeyoo

.vscode/settings.json

@@ -613,6 +613,7 @@ cc_test(
         "@com_google_googletest//:gtest_main",
         "//lib:gate_appl",
         "//lib:gates_cirq",
+        "//lib:gates_qsim",
         "//lib:mps_simulator",
         "//lib:formux",
     ],