Remove Vulkan SC-specific file from Antora build

antora/Makefile

@@ -45,7 +45,7 @@ spec_pages:
  ./config/copyright-ccby.adoc \
  ./config/copyright-spec.adoc \
  ./images/*.svg \
- `find ./gen ./chapters ./appendices -name '[A-Za-z]*.adoc'` \
+ `find ./gen ./chapters ./appendices -name '[A-Za-z]*.adoc' | grep -v /vulkanscdeviations.adoc` \
  $(JSAPIMAP)
 
 # Rewrite proposals into the module directory, 'proposals' component