Redundant sh -e / set -e in maint scripts

debian/postinst

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh
 set -e
 
 # Tag to allow some debhelper commands to inject relevant code

debian/postrm

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh
 set -e
 
 # Tag to allow some debhelper commands to inject relevant code

debian/preinst

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh
 set -e
 
 # Tag to allow some debhelper commands to inject relevant code

debian/prerm

@@ -1,4 +1,4 @@
-#!/bin/sh -e
+#!/bin/sh
 set -e
 
 # Tag to allow some debhelper commands to inject relevant code