How to use the gitman.shell.rm function in gitman

def it_detects_invalid_repositories(config):
        shell.rm(os.path.join("deps", "gitman_1", ".git"))
        shell.mkdir(os.path.join("deps", "gitman_1", ".git"))

        try:
            with pytest.raises(InvalidRepository):
                expect(gitman.install('gitman_1', depth=1)) == False

        finally:
            shell.rm(os.path.join("deps", "gitman_1"))

def it_should_fail_on_dirty_repositories(config):
        expect(gitman.update(depth=1, lock=False)) == True
        shell.rm(os.path.join("deps", "gitman_1", ".project"))

        try:
            with pytest.raises(UncommittedChanges):
                gitman.lock()

            expect(config.datafile.text).does_not_contain("")

        finally:
            shell.rm(os.path.join("deps", "gitman_1"))

def it_should_fail_on_invalid_repositories(config):
        shell.mkdir("deps")
        shell.rm(os.path.join("deps", "gitman_1", ".git"))
        shell.mkdir(os.path.join("deps", "gitman_1", ".git"))

        try:
            with pytest.raises(InvalidRepository):
                gitman.lock()

            expect(config.datafile.text).does_not_contain("")

        finally:
            shell.rm(os.path.join("deps", "gitman_1"))

def it_should_fail_on_missing_repositories(config):
        shell.mkdir("deps")
        shell.rm(os.path.join("deps", "gitman_1"))

        with pytest.raises(InvalidRepository):
            gitman.lock()

        expect(config.datafile.text).does_not_contain("")

def create_link(self, root, force=False):
        """Create a link from the target name to the current directory."""
        if not self.link:
            return

        log.info("Creating a symbolic link...")

        target = os.path.join(root, self.link)
        source = os.path.relpath(os.getcwd(), os.path.dirname(target))

        if os.path.islink(target):
            os.remove(target)
        elif os.path.exists(target):
            if force:
                shell.rm(target)
            else:
                msg = "Preexisting link location at {}".format(target)
                raise exceptions.UncommittedChanges(msg)

        shell.ln(source, target)

def clean_dependencies(self):
        """Delete the dependency storage location."""
        for path in self.get_top_level_dependencies():

            if path == self.location_path:
                log.info("Skipped dependency: %s", path)
            else:
                shell.rm(path)

            common.newline()

        shell.rm(self.log_path)

def uninstall_dependencies(self):
        """Delete the dependency storage location."""
        shell.cd(self.root)
        shell.rm(self.location_path)
        common.newline()

def clean_dependencies(self):
        """Delete the dependency storage location."""
        for path in self.get_top_level_dependencies():

            if path == self.location_path:
                log.info("Skipped dependency: %s", path)
            else:
                shell.rm(path)

            common.newline()

        shell.rm(self.log_path)