display: Remove get_lcd_timeout_from_settings()

display: Remove get_lcd_timeout_from_settings()

get_lcd_timeout_from_settings initializes timeout value for each display state,
it is called from display_init().
Every plugins needs initializing timeout value, thus it is moved to core.

This function is added to below display.
int display_initialize_display_state_timeout_from_setting(void);
-> This function gets timeout value from setting and sets for each state timeout.

Change-Id: I892672785490d266cae7224909c03d45cf0c07e1
Signed-off-by: Yunhee Seo <yuni.seo@samsung.com>