remove browser.startup.homepage_reset since it doesn't look like it is used anymore

extensions/cck/browser/resources/content/cckwizard/srcfiles/cck.properties.in

@@ -3,7 +3,6 @@ OrganizationName=%OrganizationName%
 browser.throbber.url=%browser.throbber.url%
 cckhelp.url=%cckhelp.url%
 browser.startup.homepage=%browser.startup.homepage%
-browser.startup.homepage_reset=%browser.startup.homepage%
 startup.homepage_override_url=%startup.homepage_override_url%
 PopupAllowedSites=%PopupAllowedSites%
 InstallAllowedSites=%InstallAllowedSites%