Don't explicitly warn against semicolon_in_expressions_from_macros

This has been warn-by-default for two years now and has already been
added to the future-incompat lints in 1.68.

crates/rust-analyzer/src/bin/main.rs

@@ -2,7 +2,7 @@
 //!
 //! Based on cli flags, either spawns an LSP server, or runs a batch analysis
 
-#![warn(rust_2018_idioms, unused_lifetimes, semicolon_in_expressions_from_macros)]
+#![warn(rust_2018_idioms, unused_lifetimes)]
 #![cfg_attr(feature = "in-rust-tree", feature(rustc_private))]
 #[cfg(feature = "in-rust-tree")]
 #[allow(unused_extern_crates)]

crates/rust-analyzer/src/lib.rs

@@ -9,7 +9,7 @@
 //! The `cli` submodule implements some batch-processing analysis, primarily as
 //! a debugging aid.
 
-#![warn(rust_2018_idioms, unused_lifetimes, semicolon_in_expressions_from_macros)]
+#![warn(rust_2018_idioms, unused_lifetimes)]
 
 pub mod cli;
 

crates/rust-analyzer/tests/slow-tests/main.rs

@@ -8,7 +8,7 @@
 //! specific JSON shapes here -- there's little value in such tests, as we can't
 //! be sure without a real client anyway.
 
-#![warn(rust_2018_idioms, unused_lifetimes, semicolon_in_expressions_from_macros)]
+#![warn(rust_2018_idioms, unused_lifetimes)]
 
 #[cfg(not(feature = "in-rust-tree"))]
 mod sourcegen;