Disable reading default configuration in loader_simp intrepreter

[lha_semihalf.com]

Summary

Default loader.rc and its includes are written for the forth interpreter so they can not be processed by the simple interpreter. Because of that, when loader_simp is used an “unknown command” error is seen. The process of parsing and executing commands is interrupted just at the beginning of these files, on the line: “only forth definition” and becomes pointless. This patch gets rid of reading incompatible loader.rc file, which prevents logging error during boot.