lib/utils/pyexec: Only print help prompt if HELP feature is enabled.

lib/utils/pyexec.c

@@ -229,7 +229,9 @@ STATIC int pyexec_friendly_repl_process_char(int c) {
             // reset friendly REPL
             mp_hal_stdout_tx_str("\r\n");
             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
             mp_hal_stdout_tx_str("Type \"help()\" for more information.\r\n");
+            #endif
             goto input_restart;
         } else if (ret == CHAR_CTRL_C) {
             // break
@@ -378,7 +380,9 @@ int pyexec_friendly_repl(void) {
 
 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
     mp_hal_stdout_tx_str("Type \"help()\" for more information.\r\n");
+    #endif
 
     // to test ctrl-C
     /*