[pitivi] bin: Remove obsolete MYPITIVI environment variable

[Alexandru Băluț <alexbalut src gnome org>]

commit 2f616364ca9ed463aa42241a9479f8978505e254
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Tue Oct 25 13:05:59 2016 +0200

    bin: Remove obsolete MYPITIVI environment variable
    
    Reviewed-by: Thibault Saunier <tsaunier gnome org>
    Differential Revision: https://phabricator.freedesktop.org/D1465

 bin/pitivi-env |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/bin/pitivi-env b/bin/pitivi-env
index 845962d..5c71daf 100755
--- a/bin/pitivi-env
+++ b/bin/pitivi-env
@@ -1,16 +1,19 @@
 #!/bin/bash
 
+# Script which must be sourced to setup the development environment.
+
 # This has to be the first command because BASH_SOURCE[0] gets changed.
 SCRIPT=${BASH_SOURCE[0]:-$0}
 
 [[ "${BASH_SOURCE[0]}" == "$0" ]] \
-    && printf "This script should not be executed but sourced like:\n    $ source $0\n" \
+    && echo "This script should not be executed but sourced like:" \
+    && echo "    $ source $0" \
+    && echo \
     && exit 1
 
 SCRIPTDIR=$(dirname $(realpath $SCRIPT))
 export FLATPAK_ENVPATH=$(realpath $SCRIPTDIR/../../)
 export CURRENT_GST=$FLATPAK_ENVPATH
-export MYPITIVI=$FLATPAK_ENVPATH
 
 export make="$FLATPAK_ENVPATH/pitivi/build/flatpak/pitivi-flatpak -d make"
 export check="$FLATPAK_ENVPATH/pitivi/build/flatpak/pitivi-flatpak -d make check"