Revert "[nrf noup] cmake: modules: kconfig: Add hide child/parent variable"

fixup! [nrf noup] cmake: modules: kconfig: Add hide child/parent variable

This reverts commit 2483870.

Signed-off-by: Jamie McCrae <[email protected]>

Author: nordicjm

cmake/modules/kconfig.cmake

@@ -171,7 +171,6 @@ set(COMMON_KCONFIG_ENV_SETTINGS
   TOOLCHAIN_KCONFIG_DIR=${TOOLCHAIN_KCONFIG_DIR}
   TOOLCHAIN_HAS_NEWLIB=${_local_TOOLCHAIN_HAS_NEWLIB}
   TOOLCHAIN_HAS_PICOLIBC=${_local_TOOLCHAIN_HAS_PICOLIBC}
-  HIDE_CHILD_PARENT_CONFIG=${SYSBUILD}
   EDT_PICKLE=${EDT_PICKLE}
   # Export all Zephyr modules to Kconfig
   ${ZEPHYR_KCONFIG_MODULES_DIR}