fix: improve CICP tests

Remove "Software" attribute to avoid baking OIIO-version-specific data into the out.txts

Signed-off-by: Zach Lewis <zachcanbereached@gmail.com>

Author: zachlewis

testsuite/png/ref/out-libpng15.txt

@@ -93,18 +93,15 @@ smallalpha.png       :    1 x    1, 4 channel, uint8 png
 cicp:
   16 x   16, 4 channel, float png
     channel list: R, G, B, A
-    Software: "OpenImageIO 3.1.3.0dev : DC4B1085141AF19019744DC43B156DE981E3B465"
     oiio:ColorSpace: "sRGB"
 modified_cicp:
   16 x   16, 4 channel, float png
     channel list: R, G, B, A
     CICP: 0, 0, 0, 0
-    Software: "OpenImageIO 3.1.3.0dev : DC4B1085141AF19019744DC43B156DE981E3B465"
     oiio:ColorSpace: "sRGB"
 removed_cicp:
   16 x   16, 4 channel, float png
     channel list: R, G, B, A
-    Software: "OpenImageIO 3.1.3.0dev : DC4B1085141AF19019744DC43B156DE981E3B465"
     oiio:ColorSpace: "sRGB"
 Comparing "test16.png" and "ref/test16.png"
 PASS

testsuite/png/ref/out.txt

@@ -93,19 +93,16 @@ smallalpha.png       :    1 x    1, 4 channel, uint8 png
 cicp:
   16 x   16, 4 channel, float png
     channel list: R, G, B, A
-    Software: "OpenImageIO 3.1.3.0dev : DC4B1085141AF19019744DC43B156DE981E3B465"
     CICP: 1, 13, 0, 1
     oiio:ColorSpace: "sRGB"
 modified_cicp:
   16 x   16, 4 channel, float png
     channel list: R, G, B, A
-    Software: "OpenImageIO 3.1.3.0dev : DC4B1085141AF19019744DC43B156DE981E3B465"
     CICP: 1, 13, 0, 0
     oiio:ColorSpace: "sRGB"
 removed_cicp:
   16 x   16, 4 channel, float png
     channel list: R, G, B, A
-    Software: "OpenImageIO 3.1.3.0dev : DC4B1085141AF19019744DC43B156DE981E3B465"
     oiio:ColorSpace: "sRGB"
 Comparing "test16.png" and "ref/test16.png"
 PASS

testsuite/png/run.py

@@ -34,9 +34,9 @@
 
 # Test embedding CICP metadata in PNG files
 command += oiiotool ("-i test16.png --cicp 1,13 -o test16.png")
-command += oiiotool ("-echo cicp: test16.png --printinfo")
-command += oiiotool ("-echo modified_cicp: test16.png --cicp ,,,0 --printinfo")
-command += oiiotool ("-echo removed_cicp: test16.png --cicp '' --printinfo")
+command += oiiotool ("-echo cicp: test16.png --eraseattrib Software --printinfo")
+command += oiiotool ("-echo modified_cicp: test16.png --eraseattrib Software --cicp ,,,0 --printinfo")
+command += oiiotool ("-echo removed_cicp: test16.png --eraseattrib Software --cicp '' --printinfo")
 
 outputs = [ "test16.png", "out.txt" ]