saner makefile: cleaner, simpler, suckless

config.mk

@@ -6,10 +6,10 @@ MANPREFIX = ${PREFIX}/share/man
 X11INC = /usr/X11R6/include
 X11LIB = /usr/X11R6/lib
 
-INCS = -I. -I/usr/include -I${X11INC}
+INCS = -I/usr/include -I${X11INC}
 LIBS = -L/usr/lib -lc -L${X11LIB} -lX11
 
-CPPFLAGS = -DVERSION=\"${VERSION}\" -D_GNU_SOURCE
+CPPFLAGS = -D_GNU_SOURCE
 # -Wno-unused-function for routines not activated by user
 CFLAGS = -std=c99 -pedantic -Wno-unused-function -Wall -Wextra -Os ${INCS} ${CPPFLAGS}
 LDFLAGS = ${LIBS}