[librsvg/librsvg-2.55: 4/13] install-rust.sh: Don't install rustdoc-stripper

[Federico Mena Quintero <federico src gnome org>]

commit 7125e37d092bd67f48dddaada82c806096c500c1
Author: Federico Mena Quintero <federico gnome org>
Date:   Tue Sep 6 10:57:34 2022 -0500

    install-rust.sh: Don't install rustdoc-stripper
    
    I think this is a leftover from the gtk-rs repos?

 ci/install-rust.sh | 5 -----
 1 file changed, 5 deletions(-)
---
diff --git a/ci/install-rust.sh b/ci/install-rust.sh
index 907c66360..e0c757983 100755
--- a/ci/install-rust.sh
+++ b/ci/install-rust.sh
@@ -18,8 +18,3 @@ chmod -R a+w $RUSTUP_HOME $CARGO_HOME
 rustup --version
 cargo --version
 rustc --version
-
-if [ "$RUST_VERSION" = "nightly" ]; then
-  # Documentation tools
-  cargo install --force rustdoc-stripper
-fi