Unbreak build with Rust 1.45.0

error: options `-C embed-bitcode=no` and `-C lto` are incompatible

diff --git config/makefiles/rust.mk config/makefiles/rust.mk
index 75570d3..94ec33f 100644
--- config/makefiles/rust.mk
+++ config/makefiles/rust.mk
@@ -97,7 +97,7 @@ ifndef rustflags_sancov
 # Never enable when coverage is enabled to work around https://github.com/rust-lang/rust/issues/90045.
 ifndef MOZ_CODE_COVERAGE
 ifeq (,$(findstring gkrust_gtest,$(RUST_LIBRARY_FILE)))
-cargo_rustc_flags += -Clto
+cargo_rustc_flags += 
 endif
 # We need -Cembed-bitcode=yes for all crates when using -Clto.
 RUSTFLAGS += -Cembed-bitcode=yes