[Round 2] Revert multiple source change commits for re-commit.

tools/rsfont/Makefile

@@ -8,16 +8,10 @@ SRCS = main.c convert_png.c util.c font.c
 
 .PHONY: all clean
 
-ifeq ($(OS),Windows_NT)
-EXE := .exe
-else
-EXE :=
-endif
-
-all: rsfont$(EXE)
+all: rsfont
 	@:
 
-rsfont$(EXE): $(SRCS) convert_png.h gfx.h global.h util.h font.h
+rsfont: $(SRCS) convert_png.h gfx.h global.h util.h font.h
 	$(CC) $(CFLAGS) $(SRCS) -o $@ $(LDFLAGS) $(LIBS)
 
 clean: