Remove mention of git dependency, it's not true.

README.md

@@ -45,7 +45,7 @@ Run setup:
 
     ./arch-ppa setup
 
-The setup installs a few dependencies like `devtools` and `git`. It
+The setup installs a few dependencies like `devtools`. It
 also creates a chroot directory which is a container that will be used
 to build packages in a completely clean environment using
 `systemd-nspawn`.

arch-ppa

@@ -39,7 +39,6 @@ install_system_deps() {
 	    fi
 	}
 	pkg_dep devtools
-	pkg_dep git
     )
 }