Getting "Develop" out of main menu bar.

In the process of trying to turn off the RSS feed I came across a video that suggested entering this line in the Terminal: "defaults write com.apple.Safari IncludeDebugMenu 1".

I did it and now I have "Develop" in my main menu bar. Substituting a "0" for the "1" doesn't get rid of it.

I'm using Safari 4.0 on my white Macbook, with OS 10.4.11.