Revert "ACPI: add documentation for deprecated /proc/acpi/battery in ACPI_PROCFS"

This reverts commit 6e800af233e0bdf108efb7bd23c11ea6fa34cdeb.

drivers/acpi/Kconfig

@@ -61,7 +61,6 @@ config ACPI_PROCFS
 	  /proc/acpi/info (/sys/modules/acpi/parameters/acpica_version)
 	  /proc/acpi/dsdt (/sys/firmware/acpi/tables/DSDT)
 	  /proc/acpi/fadt (/sys/firmware/acpi/tables/FACP)
-	  /proc/acpi/battery (/sys/class/power_supply)
 	  /proc/acpi/debug_layer (/sys/module/acpi/parameters/debug_layer)
 	  /proc/acpi/debug_level (/sys/module/acpi/parameters/debug_level)