Remove libpcre3-dev&pcre-devel from horizon prerequisite

As libpcre3-dev&pcre-devel are now added as general prerequisite,
remove it from horizon prerequisite.

Change-Id: I872aec210028373c39baee0ab846469fd9920de9
diff --git a/files/debs/horizon b/files/debs/horizon
index 1f45b54..4833289 100644
--- a/files/debs/horizon
+++ b/files/debs/horizon
@@ -1,3 +1,2 @@
 apache2  # NOPRIME
 libapache2-mod-wsgi  # NOPRIME
-libpcre3-dev  # pyScss
diff --git a/files/rpms/horizon b/files/rpms/horizon
index aeb2cb5..fa5601a 100644
--- a/files/rpms/horizon
+++ b/files/rpms/horizon
@@ -1,5 +1,4 @@
 Django
 httpd # NOPRIME
 mod_wsgi  # NOPRIME
-pcre-devel  # pyScss
 pyxattr