scons: avoid building any piece of i915

Leftover from commit c21fca8bf2.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Jakob Bornecrantz <wallbraker@gmail.com>

src/gallium/SConscript

@@ -21,12 +21,6 @@ SConscript([
     'drivers/trace/SConscript',
 ])
 
-if not env['msvc']:
-    # These drivers do not build on MSVC compilers
-    SConscript([
-        'drivers/i915/SConscript',
-    ])
-
 #
 # State trackers
 #
@@ -66,11 +60,6 @@ if env['platform'] == 'windows':
         'winsys/sw/gdi/SConscript',
     ])
 
-if not env['msvc']:
-    SConscript([
-        'winsys/i915/sw/SConscript',
-    ])
-
 if env['platform'] == 'haiku':
     SConscript([
         'winsys/sw/hgl/SConscript',