[fix] Draw effect target

Makefile

@@ -21,7 +21,7 @@ KERNEL_CPP = kernel/entry.cpp kernel/main.cpp kernel/serial.cpp kernel/fs.cpp \
              kernel/interrupt/gdt.cpp kernel/interrupt/idt.cpp \
              kernel/interrupt/pic.cpp kernel/interrupt/pit.cpp \
              kernel/graphics/layer.cpp \
-             graphics/context.cpp graphics/draw.cpp graphics/rect.cpp \
+             graphics/context.cpp graphics/draw.cpp \
              fonts/pixel_font.cpp
 KERNEL_ASM = kernel/scheduler/context_switch.S kernel/interrupt/isr.S kernel/interrupt/idt_helpers.S
 KERNEL_OBJ = $(KERNEL_CPP:%.cpp=build/%.o) $(KERNEL_ASM:%.S=build/%.o)