Remove obsolete references to IPCThreadState/ProcessState.

Threadpool can now be configured/joined if needed with
configureRpcThreadpool() / joinRpcThreadpool().

Bug: 31226656
Test: mma
Change-Id: I0d7d9924cc8c8851cc2b61ebdae906204909890e
(cherry picked from commit 028223775be7539c5b569a454524584a7ad8e152)
diff --git a/nfc/1.0/vts/functional/nfc_hidl_hal_test.cpp b/nfc/1.0/vts/functional/nfc_hidl_hal_test.cpp
index 3e40a9c..f5ed4d7 100644
--- a/nfc/1.0/vts/functional/nfc_hidl_hal_test.cpp
+++ b/nfc/1.0/vts/functional/nfc_hidl_hal_test.cpp
@@ -21,14 +21,12 @@
 #include <android/hardware/nfc/1.0/INfcClientCallback.h>
 #include <android/hardware/nfc/1.0/types.h>
 #include <hardware/nfc.h>
-#include <hwbinder/ProcessState.h>
 
 #include <gtest/gtest.h>
 #include <chrono>
 #include <condition_variable>
 #include <mutex>
 
-using ::android::hardware::ProcessState;
 using ::android::hardware::nfc::V1_0::INfc;
 using ::android::hardware::nfc::V1_0::INfcClientCallback;
 using ::android::hardware::nfc::V1_0::NfcEvent;
@@ -66,12 +64,6 @@
     nfc_ = INfc::getService(NFC_NCI_SERVICE_NAME, passthrough);
     ASSERT_NE(nfc_, nullptr);
 
-    // TODO:b/31748996
-    if (nfc_->isRemote()) {
-      ProcessState::self()->setThreadPoolMaxThreadCount(1);
-      ProcessState::self()->startThreadPool();
-    }
-
     nfc_cb_ = new NfcClientCallback(*this);
     ASSERT_NE(nfc_cb_, nullptr);