Revert "drm/i915/gt: Log reason for setting TAINT_WARN at reset"

This reverts commit 835443da.

Logging with gt_err() causes CI to detect an error even in cases
of intentional error injection. Since real errors are already
correctly reported by CI, this additional message is unnecessary.

Furthermore, a GT wedge is already being logged elsewhere, so
instead of adjusting the log level, revert the above mentioned
commit to prevent redundant error reporting.

Signed-off-by: Sebastian Brzezinka <sebastian.brzezinka@intel.com>
Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com>
Reviewed-by: Krzysztof Niemiec <krzysztof.niemiec@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/pynwwza2xyvicokflxc6lduwwrzwoihihaan54ago3m2xzzagu@qva2ue4tydie