hwmon: (coretemp) Delete an obsolete comment

The refinement of tjmax value retrieved from MSR_IA32_TEMPERATURE_TARGET
has been changed for several times.

Now, the raw value from MSR is used without refinement. Thus remove the
obsolete comment.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20230330103346.6044-2-rui.zhang@intel.com


Signed-off-by: Guenter Roeck <linux@roeck-us.net>