glamor: Remove warning message when pixmap cannot be stored in a texture

This happens when you have 4bpp pixmaps; it's not an error, so stop
flooding the log file when it happens.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Eric Anholt <eric@anholt.net>

glamor/glamor_pixmap.c

@@ -283,8 +283,6 @@ glamor_get_tex_format_type_from_pictformat_gl(PictFormatShort format,
         break;
 
     default:
-        LogMessageVerb(X_INFO, 0,
-                       "fail to get matched format for %x \n", format);
         return -1;
     }
     return 0;