modules: Kconfig.stm32: remove duplicate Kconfig symbol for RAMCFG

Remove the duplicate `USE_STM32_HAL_RAMCFG` Kconfig symbol definition
from Kconfig.stm32, which was introduced by accident in PR #66181,
commit 6ed002d.

Signed-off-by: Mathieu Choplain <[email protected]>

Author: mathieuchopstm

modules/Kconfig.stm32

@@ -447,11 +447,6 @@ config USE_STM32_HAL_RAMECC
 	help
 	  Enable STM32Cube RAM ECC monitoring (RAMECC) HAL module driver
 
-config USE_STM32_HAL_RAMCFG
-	bool
-	help
-	  Enable STM32Cube RAM config (RAMCFG) HAL module driver
-
 config USE_STM32_HAL_RNG
 	bool
 	help