Fix the build when you try to build slang-glslang (shader-slang#3599)

Author: jkwak-work

source/slang-glslang/slang-glslang.cpp

@@ -11,7 +11,7 @@
 #include "SPIRV/doc.h"
 #include "SPIRV/disassemble.h"
 
-#include "OGLCompilersDLL/InitializeDll.h"
+#include "glslang/MachineIndependent/localintermediate.h"
 
 #include "../../slang.h"
 
@@ -819,11 +819,6 @@ int glslang_compile_1_2(glslang_CompileRequest_1_2 * inRequest)
         // Failed
         return 1;
     }
-    if (!glslang::InitThread())
-    {
-        // Failed
-        return 1;
-    }
 
     // If it's the right size just use it
     if (inRequest->sizeInBytes == sizeof(glslang_CompileRequest_1_2))