[x86/Linux] Fix unused function warning (dotnet/coreclr#8429)

* Delete the unused code


Commit migrated from dotnet/coreclr@7f533e5

src/coreclr/src/vm/i386/excepx86.cpp

@@ -431,18 +431,6 @@ CPFH_AdjustContextForThreadSuspensionRace(CONTEXT *pContext, Thread *pThread)
 #endif // FEATURE_HIJACK
 
 
-// We want to leave true null reference exceptions alone. But if we are
-// trashing memory, we don't want the application to swallow it. The 0x100
-// below will give us false positives for debugging, if the app is accessing
-// a field more than 256 bytes down an object, where the reference is null.
-//
-// Removed use of the IgnoreUnmanagedExceptions reg key...simply return false now.
-//
-static inline BOOL
-CPFH_ShouldIgnoreException(EXCEPTION_RECORD *pExceptionRecord) {
- LIMITED_METHOD_CONTRACT;
- return FALSE;
-}
 
 static inline void
 CPFH_UpdatePerformanceCounters() {