Remove outdated rustup installation issue description

Author: mashuler

docs/user/manual.adoc

@@ -181,19 +181,6 @@ On Unix, running the editor from a shell or changing the `.desktop` file to set
 $ rustup component add rust-analyzer
 ----
 
-However, in contrast to `component add clippy` or `component add rustfmt`, this does not actually place a `rust-analyzer` binary in `~/.cargo/bin`, see https://github.com/rust-lang/rustup/issues/2411[this issue]. You can find the path to the binary using:
-[source,bash]
-----
-$ rustup which --toolchain stable rust-analyzer
-----
-You can link to there from `~/.cargo/bin` or configure your editor to use the full path.
-
-Alternatively you might be able to configure your editor to start `rust-analyzer` using the command:
-[source,bash]
-----
-$ rustup run stable rust-analyzer
-----
-
 ==== Arch Linux
 
 The `rust-analyzer` binary can be installed from the repos or AUR (Arch User Repository):