Clean up Common.hlsl

ScriptableRenderPipeline/Core/ShaderLibrary/Common.hlsl

     return (x < 1.0) ? poly : HALF_PI - poly;
 }
 
-// TODO: this intrinsic is unavailable outside compute. This is a Unity shader compiler bug.
-#if (SHADER_TARGET >= 50) && (SHADER_STAGE_COMPUTE != 0)
+#if (SHADER_TARGET >= 50)
-    return firstbithigh(x) – 1u;
+    return firstbithigh(x) - 1u;
 }
 #endif
 

ScriptableRenderPipeline/Core/ShaderLibrary/Hammersley.hlsl

 // Ref: http://holger.dammertz.org/stuff/notes_HammersleyOnHemisphere.html
 uint ReverseBits32(uint bits)
 {
-// TODO: this intrinsic is unavailable outside compute. This is a Unity shader compiler bug.
-#if (SHADER_TARGET >= 50) && (SHADER_STAGE_COMPUTE != 0)
+#if (SHADER_TARGET >= 50)
     return reversebits(bits);
 #else
     bits = (bits << 16) | (bits >> 16);