dev, x86: Delete the now unused X86 specific interrupt pins/lines.

Change-Id: I3915f0ad673119b551dcc4c5cedec180a9b88735
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/20702
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/dev/x86/SConscript

@@ -65,6 +65,5 @@ if env['TARGET_ISA'] == 'x86':
     Source('i82094aa.cc')
     DebugFlag('I82094AA')
 
-    SimObject('X86IntPin.py')
     Source('intdev.cc')
     DebugFlag('IntDevice')