kbuild: deb-pkg: remove support for EMAIL environment variable

Commit edec611 ("kbuild, deb-pkg: improve maintainer
identification") added the EMAIL and NAME environment variables.

Commit d5940c6 ("kbuild: deb-pkg improve maintainer address
generation") removed support for NAME, but kept support for EMAIL.

The EMAIL and NAME environment variables are supported by some tools
(see 'man debchange'), but not by all.

We should support both of them, or neither of them. We should not stop
halfway.

Signed-off-by: Masahiro Yamada <[email protected]>
Reviewed-by: Nicolas Schier <[email protected]>

Author: masahir0y

scripts/package/mkdebian

@@ -125,7 +125,7 @@ gen_source ()
 rm -rf debian
 mkdir debian
 
-email=${DEBEMAIL-$EMAIL}
+email=${DEBEMAIL}
 
 # use email string directly if it contains <email>
 if echo "${email}" | grep -q '<.*>'; then