ath79-generic: remove unused package definitions

This removes the unused package definitions, as otherwise the Lua linter
will complain.

targets/ath79-generic

-local ATH10K_PACKAGES = {'kmod-ath10k', '-kmod-ath10k-ct', 'ath10k-firmware-qca988x', '-ath10k-firmware-qca988x-ct'}
-local ATH10K_PACKAGES_QCA9887 = {'kmod-ath10k', '-kmod-ath10k-ct', 'ath10k-firmware-qca9887', '-ath10k-firmware-qca9887-ct'}
+-- local ATH10K_PACKAGES = {'kmod-ath10k', '-kmod-ath10k-ct', 'ath10k-firmware-qca988x', '-ath10k-firmware-qca988x-ct'}
+-- local ATH10K_PACKAGES_QCA9887 = {'kmod-ath10k', '-kmod-ath10k-ct', 'ath10k-firmware-qca9887', '-ath10k-firmware-qca9887-ct'}
 local ATH10K_PACKAGES_QCA9888 = {'kmod-ath10k', '-kmod-ath10k-ct', 'ath10k-firmware-qca9888', '-ath10k-firmware-qca9888-ct'}
 
 -- TP-Link