Options for silent compilation

A single keyboard is always by default compiled in verbose mode.
While multiple keyboards are compiled in silent mode. This can be
overriden by the silent variable from the command line

message.mk

@@ -19,10 +19,6 @@ OK_STRING=$(OK_COLOR)[OK]$(NO_COLOR)\n
 ERROR_STRING=$(ERROR_COLOR)[ERRORS]$(NO_COLOR)\n
 WARN_STRING=$(WARN_COLOR)[WARNINGS]$(NO_COLOR)\n
 
-ifndef $(SILENT)
-	SILENT = false
-endif
-
 TAB_LOG = printf "\n$$LOG\n\n" | $(AWK) '{ sub(/^/," | "); print }'
 TAB_LOG_PLAIN = printf "$$LOG\n"
 AWK_STATUS = $(AWK) '{ printf " %-10s\n", $$1; }'