Revert "gnu: rust: Remove more bundled sources."

This reverts commit 7e777d70e67cc90f019988aa2af68bbf1fe25c00.

This makes it impractical to update several libraries without a rust
rebuild. Since rust doesn't retain a reference to these libraries it
isn't clear that this is the best choice.

gnu/packages/rust.scm

@@ -50,7 +50,6 @@
   #:use-module (gnu packages python)
   #:use-module (gnu packages ssh)
   #:use-module (gnu packages tls)
-  #:use-module (gnu packages version-control)
   #:use-module (gnu packages)
   #:use-module (guix build-system cargo)
   #:use-module (guix build-system copy)
@@ -712,33 +711,6 @@ safety and thread safety guarantees.")
     (package
       (inherit base-rust)
       (outputs (cons "rustfmt" (package-outputs base-rust)))
-      ;; This is the rust we build everything with, so we make sure to unbundle more.
-      ;; We allow other versions of the rust compiler to use bundled sources so we
-      ;; don't have to worry about carrying old versions of some libraries.
-      (source
-        (origin
-          (inherit (package-source base-rust))
-          (snippet
-           '(begin
-              (for-each delete-file-recursively
-                        '("src/llvm-project"
-                          "vendor/curl-sys/curl"
-                          "vendor/jemalloc-sys/jemalloc"
-                          "vendor/libgit2-sys/libgit2"
-                          ;"vendor/libnghttp2-sys/nghttp2"
-                          "vendor/libssh2-sys/libssh2"
-                          "vendor/libz-sys/src/zlib"
-                          ;"vendor/libz-sys/src/zlib-ng"
-                          "vendor/lzma-sys/xz-5.2"
-                          ;"vendor/openssl-src"
-                          "vendor/tikv-jemalloc-sys/jemalloc"))
-              ;; Remove vendored dynamically linked libraries.
-              ;; find . -not -type d -executable -exec file {} \+ | grep ELF
-              (delete-file "vendor/vte/vim10m_match")
-              (delete-file "vendor/vte/vim10m_table")
-              ;; Also remove the bundled (mostly Windows) libraries.
-              (for-each delete-file
-                        (find-files "vendor" ".*\\.(a|dll|exe|lib)$"))))))
       (arguments
        (substitute-keyword-arguments (package-arguments base-rust)
          ((#:tests? _ #f)
@@ -835,11 +807,6 @@ safety and thread safety guarantees.")
                                 ((file) file))
                    (("fn ctrl_c_kills_everyone")
                     "#[ignore]\nfn ctrl_c_kills_everyone"))))
-             (add-after 'set-env 'set-more-env
-               (lambda* (#:key inputs #:allow-other-keys)
-                 (setenv "LIBGIT2_SYS_USE_PKG_CONFIG" "1")
-                 (setenv "LIBSSH2_SYS_USE_PKG_CONFIG" "1")
-                 (setenv "OPENSSL_DIR" (assoc-ref inputs "openssl"))))
              (add-after 'configure 'add-gdb-to-config
                (lambda* (#:key inputs #:allow-other-keys)
                  (let ((gdb (assoc-ref inputs "gdb")))
@@ -884,8 +851,6 @@ safety and thread safety guarantees.")
                    (("prefix = \"[^\"]*\"")
                     (format #f "prefix = ~s" (assoc-ref outputs "rustfmt"))))
                  (invoke "./x.py" "install" "rustfmt")))))))
-      (inputs (modify-inputs (package-inputs base-rust)
-                             (prepend curl libgit2 libssh xz zlib)))
       ;; Add test inputs.
       (native-inputs (cons* `("gdb" ,gdb/pinned)
                             `("procps" ,procps)