python: Drop version 3.8.12

oe-core now comes with a newer version: 3.10.0. 3.8.12 version was an
upgrade for dunfell but now that we move to newer layers, we can drop it
and use the latest in upstream.

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-oniro-core/conf/distro/oniro-linux.conf

@@ -119,8 +119,6 @@ PREFERRED_PROVIDER_virtual/kernel_qemu-generic-arm64 = "linux-oniro"
 # qemu-generic-arm64 specific requirements
 PREFERRED_VERSION_optee-os_qemu-generic-arm64 = "3.14.0"
 
-PREFERRED_VERSION_python = "3.8.12"
-
 # Default to enabling serial debug console on RaspberryPi
 ENABLE_UART ?= "1"