le-pregao-712010: Refs #1280, improve sed(1) to remove only the expected lines

Signed-off-by: Lior Spach <ls12@inf.ufpr.br>

le-pregao-712010/pacote/DEBIAN/postrm

@@ -20,18 +20,18 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 # USA.
 
+#If upgrading, there is no need to execute this code
 if [[ "$1" = "upgrade" ]]; then
     exit 0
 fi
 
-# TODO: remove lines instead of changing them to "blank"
 # removing conflicting modules from blacklist
-sed -i s/'# replaced by rt3562sta'/''/ /etc/modprobe.d/blacklist.conf
-sed -i s/'blacklist rt2800pci'/''/ /etc/modprobe.d/blacklist.conf
+sed -i '/# replaced by rt3562sta$/d' /etc/modprobe.d/blacklist.conf
+sed -i '/blacklist rt2800pci$/d' /etc/modprobe.d/blacklist.conf
 
 # removing wireless entries from modules file
-sed -i s/'# enable wireless for pregao 71/2010'/''/ /etc/modules
-sed -i s/'rt3562sta'/''/ /etc/modules
+sed -i '/# enable wireless for pregao 71\/2010$/d' /etc/modules
+sed -i '/rt3562sta$/d' /etc/modules
 
 echo "Removing wireless module from dkms tree..."
 dkms remove -m lepregao712010 -v 2.3.0.0-Alpha-v2 --all