submodules: update clippy from 1ff81c1 to 70b93aa

Changes: ```` remove redundant import rustup #68404 rustup #69644 rustup #70344 Move verbose_file_reads to restriction move redundant_pub_crate to nursery readme: explain how to run only a single lint on a codebase Remove dependency on `matches` crate Move useless_transmute to nursery nursery group -> style Update for PR feedback Auto merge of #5314 - ehuss:remove-git2, r=flip1995 Lint for `pub(crate)` items that are not crate visible due to the visibility of the module that contains them ```` Fixes #70456
rust-lang · Mar 27, 2020 · 6e01d0f · 6e01d0f
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commit 6e01d0f
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diff --git a/Cargo.lock b/Cargo.lock
@@ -483,7 +483,6 @@ dependencies = [
  "if_chain",
  "itertools 0.9.0",
  "lazy_static 1.4.0",
- "matches",
  "pulldown-cmark 0.7.0",
  "quine-mc_cluskey",
  "regex-syntax",

diff --git a/src/tools/clippy b/src/tools/clippy