Remove independent tools and link to pokemon-asm-tools

palfix.py still exists since it is often needed

tools/Makefile

@@ -4,7 +4,6 @@ CC := gcc
 CFLAGS := -O3 -flto -std=c11 -Wall -Wextra -pedantic
 
 tools := \
-	bpp2png \
 	lzcomp \
 	gfx \
 	make_patch \
@@ -27,9 +26,6 @@ pokemon_animation_graphics: common.h
 scan_includes: common.h
 stadium: common.h
 
-bpp2png: bpp2png.c lodepng/lodepng.c common.h lodepng/lodepng.h
-	$(CC) $(CFLAGS) -o $@ bpp2png.c lodepng/lodepng.c
-
 lzcomp: CFLAGS += -Wno-strict-overflow -Wno-sign-compare
 lzcomp: $(wildcard lz/*.c) $(wildcard lz/*.h)
 	$(CC) $(CFLAGS) -o $@ lz/*.c