lib/utils/pyexec: Remove obsolete LCD initialization.

This was added a long time ago in 75abee206d
when USB host support was added to the stm (now stm32) port, and when this
pyexec code was actually part of the stm port.  It's unlikely to work as
intended anymore.  If it is needed in the future then generic hook macros
can be added in pyexec.

lib/utils/pyexec.c

@@ -546,12 +546,6 @@ int pyexec_friendly_repl(void) {
     vstr_t line;
     vstr_init(&line, 32);
 
-    #if defined(USE_HOST_MODE) && MICROPY_HW_HAS_LCD
-    // in host mode, we enable the LCD for the repl
-    mp_obj_t lcd_o = mp_call_function_0(mp_load_name(qstr_from_str("LCD")));
-    mp_call_function_1(mp_load_attr(lcd_o, qstr_from_str("light")), mp_const_true);
-    #endif
-
 friendly_repl_reset:
     mp_hal_stdout_tx_str("MicroPython " MICROPY_GIT_TAG " on " MICROPY_BUILD_DATE "; " MICROPY_HW_BOARD_NAME " with " MICROPY_HW_MCU_NAME "\r\n");
     #if MICROPY_PY_BUILTINS_HELP