you should include these files to source control.
'plist' is a property list file for application written with xml that include icon file name, build option, and more.
'pch' is precompiled header file has referenced from all of your project.
'en.lproj' and 'InfoPlist.strings' are for language localized files. default language have set by English.
if you remove these files, occur error on build. and Xcode can not re create these from other files.