Makefile: Remove CFLAGS unsupported by old gcc

src/Makefile

@@ -1,7 +1,7 @@
 include ../config.mk
 
 CPPFLAGS += -DVERSION=\"$(VERSION)\" -D_GNU_SOURCE -I.
-CFLAGS += -W -Wall -Wno-unused-parameter -Wno-unused-result -O2 -pedantic -std=c99
+CFLAGS += -W -Wall -O2 -pedantic -std=c99
 LIBS += -lm -lusb
 
 OBJS = main.o nolo.o printf-utils.o image.o fiasco.o device.o usb-device.o cold-flash.o dump.o qmode.o console.o squeue/squeue.o operations.o local.o mkii.o disk.o