Remove deprecated cpp auth function #13768

Job	Run time
check_and_prepare	20s
build-android-ubuntu-22.04	29m 47s
build-ios-macos-14	1h 10m 2s
build-tvos-macos-14	52m 34s
build-android-windows-latest	41m 35s
build-android-macos-14	39m 30s
build-desktop-windows-latest-x64-openssl	1h 2m 31s
build-desktop-ubuntu-22.04-x64-openssl	26m 57s
test-android-macos-14-emulator_ftl_target-gameloop	8m 43s
test-android-ubuntu-22.04-android_target-gameloop	15m 15s
test-android-windows-latest-android_target-gameloop	10m 18s
test-android-macos-14-android_target-gameloop	9m 2s
test-android-windows-latest-emulator_ftl_target-gameloop	8m 1s
test-android-ubuntu-22.04-emulator_ftl_target-gameloop	12m 13s
test-tvos-macos-14-tvos_simulator	20m 57s
test-desktop-ubuntu-22.04-x64-openssl	4m 6s
test-desktop-windows-latest-x64-openssl	8m 35s
test-ios-macos-14-simulator_target-gameloop	17m 37s
test-ios-macos-14-ios_target-gameloop	10m 59s
summarize-results	19s
attempt-retry	0s
	7h 29m 21s

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