intel/fs: Get rid of the IMAGE_SIZE opcode

Since switching to SHADER_OPCODE_SEND for image operations, we no longer
need the non-logical opcode.

Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>

src/intel/compiler/brw_shader.cpp

@@ -270,8 +270,6 @@ brw_instruction_name(const struct gen_device_info *devinfo, enum opcode op)
    case SHADER_OPCODE_SAMPLEINFO_LOGICAL:
       return "sampleinfo_logical";
 
-   case SHADER_OPCODE_IMAGE_SIZE:
-      return "image_size";
    case SHADER_OPCODE_IMAGE_SIZE_LOGICAL:
       return "image_size_logical";