Removed redundant category
Removed redundant category

"Sydney Opera House from the west" already contains the category "Sydney Opera House", so it is not recommended to include it.
I understand this is just an example, but still better show the right thing when educating users.
psh/apps-android-commons,neslihanturan/apps-android-commons,commons-app/apps-android-commons,dbrant/apps-android-commons,maskaravivek/apps-android-commons,neslihanturan/apps-android-commons,nicolas-raoul/apps-android-commons,neslihanturan/apps-android-commons,whym/apps-android-commons,misaochan/apps-android-commons,nicolas-raoul/apps-android-commons,domdomegg/apps-android-commons,maskaravivek/apps-android-commons,domdomegg/apps-android-commons,domdomegg/apps-android-commons,maskaravivek/apps-android-commons,commons-app/apps-android-commons,misaochan/apps-android-commons,maskaravivek/apps-android-commons,whym/apps-android-commons,commons-app/apps-android-commons,neslihanturan/apps-android-commons,domdomegg/apps-android-commons,domdomegg/apps-android-commons,commons-app/apps-android-commons,whym/apps-android-commons,neslihanturan/apps-android-commons,misaochan/apps-android-commons,commons-app/apps-android-commons,dbrant/apps-android-commons,psh/apps-android-commons,nicolas-raoul/apps-android-commons,nicolas-raoul/apps-android-commons,misaochan/apps-android-commons,psh/apps-android-commons,dbrant/apps-android-commons,dbrant/apps-android-commons,maskaravivek/apps-android-commons,psh/apps-android-commons,whym/apps-android-commons,misaochan/apps-android-commons,misaochan/apps-android-commons,psh/apps-android-commons