Cleanup for years unused code

Compiler was also getting confused and actually not removing the unused functions.
So that also saves binary space.

Makefile

@@ -26,7 +26,7 @@ OBJS = $(addprefix $(BUILDDIR)/$(TARGET)/, \
 	start.o exception_handlers.o \
 	main.o heap.o \
 	gfx.o logos.o tui.o \
-	fe_emmc_tools.o fe_info.o fe_tools.o \
+	fe_info.o fe_tools.o \
 )
 
 # Hardware.