Remove an obsolete test.

The tested functionality is no longer implemented in the renderer process; and
moreover, is likely changing soon anyway.

BUG=330077
TEST=none
TBR=gcasto@chromium.org

Review URL: https://codereview.chromium.org/119603004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242601 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242601
Disable flacky TestNoScriptDuplicatesOnPanelSwitch test.

BUG=317725
TBR=vsevik

Review URL: https://codereview.chromium.org/118493003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@242602 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 242602