Don't map g22_rec709_display to any CICP code for now

This is unlikely meant to be written with Gamma 2.2 color metadata,
so keep behavior unchanged until there is decision on what to do.

Author: brechtvl

src/libOpenImageIO/color_ocio.cpp

@@ -2099,8 +2099,11 @@ constexpr ColorInteropID color_interop_ids[] = {
       CICPMatrix::Rec2020_NCL },
     { "hlg_rec2020_display", CICPPrimaries::Rec2020, CICPTransfer::HLG,
       CICPMatrix::Rec2020_NCL },
-    { "g22_rec709_display", CICPPrimaries::Rec709, CICPTransfer::Gamma22,
-      CICPMatrix::BT709 },
+    // No CICP mapping to keep previous behavior unchanged, as Gamma 2.2
+    // display is more likely meant to be written as sRGB. On read the
+    // scene referred interop ID will be used.
+    { "g22_rec709_display",
+      /* CICPPrimaries::Rec709, CICPTransfer::Gamma22, CICPMatrix::BT709 */ },
     // No CICP code for Adobe RGB primaries.
     { "g22_adobergb_display" },
     { "g26_p3d65_display", CICPPrimaries::P3D65, CICPTransfer::Gamma26,