Revert "Disable rust-lld on nightly to fix ci failure" (#67)

This reverts commit b2d6e58.

Author: kezhuw

.github/workflows/ci.yml

@@ -78,10 +78,6 @@ jobs:
     - name: Install krb5
       run: |
         sudo apt install -y libkrb5-dev
-    # dtolnay/linkme#88
-    # rust-lang/rust#124129
-    - name: Disable rust-lld
-      run: echo RUSTFLAGS=${RUSTFLAGS}\ -Zlinker-features=-lld >> $GITHUB_ENV
     - run: cargo build --all-features --verbose
     - name: Run tests
       run: LLVM_PROFILE_FILE="zookeeper-client-%p-%m.profraw" cargo test --all-features --verbose -- --nocapture