Ubuntu Duplicate sources.list entry error on sudo apt-get install scala

I'm trying to install scala and keep running into this error when I type:

sudo apt-get install scala

I've got the following errors:

W: Duplicate sources.list entry http://dl.google.com/linux/chrome/deb/ stable/main amd64 Packages (/var/lib/apt/lists/dl.google.com_linux_chrome_deb_dists_stable_main_binary-amd64_Packages)W: Duplicate sources.list entry http://dl.google.com/linux/chrome/deb/ stable/main i386 Packages (/var/lib/apt/lists/dl.google.com_linux_chrome_deb_dists_stable_main_binary-i386_Packages)E: Encountered a section with no Package: headerE: Problem with MergeList /var/lib/apt/lists/toolbelt.heroku.com_ubuntu_._enE: The package lists or status file could not be parsed or opened.

I followed these instructions on how to fix it but it didn't work.

https://askubuntu.com/questions/120621/how-to-fix-duplicate-sources-list-entry

Here is my sources.list file

# deb cdrom:[Ubuntu 12.04.2 LTS _Precise Pangolin_ - Release amd64 (20130213)]/dists/precise/main/binary-i386/# deb cdrom:[Ubuntu 12.04.2 LTS _Precise Pangolin_ - Release amd64 (20130213)]/ dists/precise/restricted/binary-i386/# deb cdrom:[Ubuntu 12.04.2 LTS _Precise Pangolin_ - Release amd64 (20130213)]/ precise main restricted# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to# newer versions of the distribution.deb http://us.archive.ubuntu.com/ubuntu/ precise main restricteddeb-src http://us.archive.ubuntu.com/ubuntu/ precise main restricted## Major bug fix updates produced after the final release of the## distribution.deb http://us.archive.ubuntu.com/ubuntu/ precise-updates main restricteddeb-src http://us.archive.ubuntu.com/ubuntu/ precise-updates main restricted## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu## team. Also, please note that software in universe WILL NOT receive any## review or updates from the Ubuntu security team.deb http://us.archive.ubuntu.com/ubuntu/ precise universedeb-src http://us.archive.ubuntu.com/ubuntu/ precise universedeb http://us.archive.ubuntu.com/ubuntu/ precise-updates universedeb-src http://us.archive.ubuntu.com/ubuntu/ precise-updates universe## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu ## team, and may not be under a free licence. Please satisfy yourself as to ## your rights to use the software. Also, please note that software in ## multiverse WILL NOT receive any review or updates from the Ubuntu## security team.deb http://us.archive.ubuntu.com/ubuntu/ precise multiversedeb-src http://us.archive.ubuntu.com/ubuntu/ precise multiversedeb http://us.archive.ubuntu.com/ubuntu/ precise-updates multiversedeb-src http://us.archive.ubuntu.com/ubuntu/ precise-updates multiverse## N.B. software from this repository may not have been tested as## extensively as that contained in the main release, although it includes## newer versions of some applications which may provide useful features.## Also, please note that software in backports WILL NOT receive any review## or updates from the Ubuntu security team.deb http://us.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse

deb-src http://us.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiverse

deb http://security.ubuntu.com/ubuntu precise-security main restricteddeb-src http://security.ubuntu.com/ubuntu precise-security main restricteddeb http://security.ubuntu.com/ubuntu precise-security universedeb-src http://security.ubuntu.com/ubuntu precise-security universedeb http://security.ubuntu.com/ubuntu precise-security multiversedeb-src http://security.ubuntu.com/ubuntu precise-security multiverse## Uncomment the following two lines to add software from Canonical's## 'partner' repository.## This software is not part of Ubuntu, but is offered by Canonical and the## respective vendors as a service to Ubuntu users.deb http://archive.canonical.com/ubuntu precise partnerdeb-src http://archive.canonical.com/ubuntu precise partner## This software is not part of Ubuntu, but is offered by third-party## developers who want to ship their latest software.deb http://extras.ubuntu.com/ubuntu precise maindeb-src http://extras.ubuntu.com/ubuntu precise main