From: Pavel Sobolev <contact@paveloom.dev>
Subject: [PATCH] Don't build `spirv-tools`.

Signed-off-by: Pavel Sobolev <contact@paveloom.dev>

--- a/externals/CMakeLists.txt
+++ b/externals/CMakeLists.txt
@@ -412,11 +412,6 @@ if (ENABLE_VULKAN)
         add_subdirectory(spirv-headers EXCLUDE_FROM_ALL)
     endif()
 
-    # spirv-tools
-    # TODO: Implement USE_SYSTEM_SPIRV_TOOLS -OS
-    set(SPIRV_SKIP_EXECUTABLES ON)
-    add_subdirectory(spirv-tools EXCLUDE_FROM_ALL)
-
     # glslang
     if(USE_SYSTEM_GLSLANG)
         find_package(glslang REQUIRED)