Remove 4 duplicate test cases in Nsa5gSmsTest.py

There are 4 duplicate test cases as below:
1.test_5g_nsa_sms_mo_iwlan()
2.test_5g_nsa_sms_mt_iwlan()
3.test_5g_nsa_sms_mo_iwlan_apm_off()
4.test_5g_nsa_sms_mt_iwlan_apm_off()

Bug: None
Test: Yes, locally
Change-Id: I987f533c10fc1d0f8e173436c87ebe9b449d648e
1 file changed
tree: 7c9f16d2f601e63368ead5a1e8d2edac3a0d0d5f
  1. acts/
  2. acts_tests/
  3. tools/
  4. wts-acts/
  5. Android.mk
  6. OWNERS
  7. PREUPLOAD.cfg