Remove OS(QNX) support.

Source/wtf/ThreadingPthreads.cpp

Index: Source/wtf/ThreadingPthreads.cpp
diff --git a/Source/wtf/ThreadingPthreads.cpp b/Source/wtf/ThreadingPthreads.cpp
index fa7b706b942c52887df7ecd97894a6b780ec9ad2..21adbda1153c37e3a0d0c9a11b6bad9fe3190334 100644
--- a/Source/wtf/ThreadingPthreads.cpp
+++ b/Source/wtf/ThreadingPthreads.cpp
@@ -110,26 +110,11 @@ static Mutex& threadMapMutex()
     return mutex;
 }
 
-#if OS(QNX) && CPU(ARM_THUMB2)
-static void enableIEEE754Denormal()
-{
-    // Clear the ARM_VFP_FPSCR_FZ flag in FPSCR.
-    unsigned fpscr;
-    asm volatile("vmrs %0, fpscr" : "=r"(fpscr));
-    fpscr &= ~0x01000000u;
-    asm volatile("vmsr fpscr, %0" : : "r"(fpscr));
-}
-#endif
-
 void initializeThreading()
 {
     if (atomicallyInitializedStaticMutex)
         return;
 
-#if OS(QNX) && CPU(ARM_THUMB2)
-    enableIEEE754Denormal();
-#endif
-
     WTF::double_conversion::initialize();
     // StringImpl::empty() does not construct its static string in a threadsafe fashion,
     // so ensure it has been initialized from here.
@@ -216,8 +201,6 @@ void initializeCurrentThreadInternal(const char* threadName)
 {
 #if HAVE(PTHREAD_SETNAME_NP)
     pthread_setname_np(threadName);
-#elif OS(QNX)
-    pthread_setname_np(pthread_self(), threadName);
 #else
     UNUSED_PARAM(threadName);
 #endif
@@ -228,10 +211,6 @@ void initializeCurrentThreadInternal(const char* threadName)
     objc_registerThreadWithCollector();
 #endif
 
-#if OS(QNX) && CPU(ARM_THUMB2)
-    enableIEEE754Denormal();
-#endif
-
     ThreadIdentifier id = identifierByPthreadHandle(pthread_self());
     ASSERT(id);
     ThreadIdentifierData::initialize(id);