Avoid bootstrap from updating rls submodule

[raoulstrackx]

Our CI performing tests of the x86_64-fortanix-unknown-sgx failed with:

21:00:53 + ./configure --enable-lld --disable-rpath --set llvm.ninja=false --set rust.verbose-tests=true
21:00:53 + ./x.py test --stage=1 --target=x86_64-fortanix-unknown-sgx library/std --host= --no-doc --exclude src/tools/linkchecker
21:00:53 Building rustbuild
21:00:53     Finished dev [unoptimized] target(s) in 0.11s
21:00:53 Updating submodule src/tools/rls
21:00:54 Building stage0 std artifacts (x86_64-unknown-linux-gnu -> x86_64-unknown-linux-gnu)
21:00:54     Updating crates.io index
21:00:55     Updating git repository `[https://github.com/rust-lang/cargo`](https://github.com/rust-lang/cargo%60)
...
21:00:55     Updating git repository `[https://github.com/rust-lang/rust-clippy`](https://github.com/rust-lang/rust-clippy%60)
21:00:56     Updating git repository `[https://github.com/rust-lang/rustfmt`](https://github.com/rust-lang/rustfmt%60)
21:00:56 error: failed to select a version for `libgit2-sys`.
21:00:56     ... required by package `cargo v0.65.0 (https://github.com/rust-lang/cargo?rev=5514f1e0e1b3650ed8a78306198e90b66b292693#5514f1e0)`
21:00:56     ... which satisfies git dependency `cargo` of package `rls v1.41.0 (/home/jenkins/workspace/rust-sgx-ci/rust/src/tools/rls)`
21:00:56 versions that meet the requirements `^0.13.2` are: 0.13.4+1.4.2, 0.13.3+1.4.2, 0.13.2+1.4.2
21:00:56 
21:00:56 the package `libgit2-sys` links to the native library `git2`, but it conflicts with a previous package which links to `git2` as well:
21:00:56 package `libgit2-sys v0.14.0+1.5.0`
21:00:56     ... which satisfies dependency `libgit2-sys = "^0.14.0"` of package `cargo v0.66.0 (/home/jenkins/workspace/rust-sgx-ci/rust/src/tools/cargo)`
21:00:56 Only one package in the dependency graph may specify the same links value. This helps ensure that only one copy of a native library is linked in the final binary. Try to adjust your dependencies so that only one package uses the links ='libgit2-sys' value. For more information, see https://doc.rust-lang.org/cargo/reference/resolver.html#links.
21:00:56 
21:00:56 failed to select a version for `libgit2-sys` which could resolve this conflict

This is related to the version bump of libgit2-sys in #11004, but the root cause is the RLS is sunset (#100863). When the bootstrapper manages the git submodules, the wrong repo commit is checked out. This PR removes rls from the list of rust submodules.

[rust-highfive]

r? @jyn514

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[jyn514]

I don't quite understand why this caused the error you saw, but it looks correct. Thanks!

[jyn514]

@bors r+ rollup p=1

[bors]

📌 Commit 96b4ca0 has been approved by jyn514

It is now in the queue for this repository.

[bors]

⌛ Testing commit 96b4ca0 with merge 350cca3...

[bors]

☀️ Test successful - checks-actions
Approved by: jyn514
Pushing 350cca3 to master...

[rust-timer]

Finished benchmarking commit (350cca3): comparison URL.

Overall result: ❌ regressions - no action needed

@rustbot label: -perf-regression

Instruction count

This is a highly reliable metric that was used to determine the overall result at the top of this comment.

	mean1	range	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	1.2%	[1.2%, 1.2%]	2
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-	-	0
All ❌✅ (primary)	-	-	0

Max RSS (memory usage)

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean1	range	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	3.2%	[2.2%, 3.9%]	3
Improvements ✅ (primary)	-	-	0
Improvements ✅ (secondary)	-3.5%	[-3.5%, -3.4%]	2
All ❌✅ (primary)	-	-	0

Cycles

Results

This is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.

	mean1	range	count2
Regressions ❌ (primary)	-	-	0
Regressions ❌ (secondary)	3.5%	[2.8%, 4.3%]	2
Improvements ✅ (primary)	-2.3%	[-2.3%, -2.3%]	1
Improvements ✅ (secondary)	-3.5%	[-3.9%, -3.1%]	2
All ❌✅ (primary)	-2.3%	[-2.3%, -2.3%]	1

Footnotes

1. the arithmetic mean of the percent change ↩ ↩² ↩³

2. number of relevant changes ↩ ↩² ↩³