message: Avoid duplicate code push
  Summary: Avoid pushing constructed instructions twice in the `IRTypeCheckerTest`.
diff: @@ -682,7 +682,6 @@ TEST_F(IRTypeCheckerTest, joinDexTypesSharingCommonBaseSimple) {
  code->push_back(insns[8]);
  code->push_back(insns[9]);
  - add_code(insns);
  IRTypeChecker checker(m_method);
  checker.run();
  // Checks
  @@ -793,7 +792,6 @@ TEST_F(IRTypeCheckerTest, joinCommonBaseWithConflictingInterface) {
  code->push_back(insns[8]);
  code->push_back(insns[9]);
  - add_code(insns);
  IRTypeChecker checker(m_method);
  checker.run();
  // Checks
  @@ -905,7 +903,6 @@ TEST_F(IRTypeCheckerTest, joinCommonBaseWithMergableInterface) {
  code->push_back(insns[8]);
  code->push_back(insns[9]);
  - add_code(insns);
  IRTypeChecker checker(m_method);
  checker.run();
  // Checks
  @@ -982,7 +979,6 @@ TEST_F(IRTypeCheckerTest, invokeInvalidObjectType) {
  code->push_back(insns[4]);
  code->push_back(insns[5]);
  - add_code(insns);
  IRTypeChecker checker(m_method);
  checker.run();
  