Fix botched sed hack

light.spec.in

@@ -13,8 +13,8 @@ Light is a program to control backlight controllers under GNU/Linux.
 
 %prep
 %autosetup -n %{name}-%{version}
-sed -i -e 's/chown root//' Makefile
-sed -i -e 's/chmod 4755//' Makefile
+sed -i -e '/chown root/d' Makefile
+sed -i -e '/chmod 4755/d' Makefile
 
 %build
 make %{?_smp_mflags}