Remove Atmel FLIP from install scripts and documentation (#8822)

tmk_core/rules.mk

@@ -439,7 +439,7 @@ $(eval $(foreach OUTPUT,$(OUTPUTS),$(shell mkdir -p $(OUTPUT) 2>/dev/null)))
 .PHONY : all finish sizebefore sizeafter qmkversion \
 gccversion build elf hex eep lss sym coff extcoff \
 clean clean_list debug gdb-config show_path \
-program teensy dfu flip dfu-ee flip-ee dfu-start \
+program teensy dfu dfu-ee dfu-start \
 flash dfu-split-left dfu-split-right \
 avrdude-split-left avrdude-split-right \
 avrdude-loop usbasp