Remove remaining SKIP_LINK=1 in circleci config (#9669)

Summary:
Should be unnecessary

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9669

Test Plan: CI

Reviewed By: ajkr

Differential Revision: D34689277

Pulled By: pdillinger

fbshipit-source-id: 5d44de1f851503fd1777b869c06c330f3c4deade

.circleci/config.yml

@@ -422,7 +422,7 @@ jobs:
     steps:
       - pre-steps
       - run: sudo apt-get update -y && sudo apt-get install gcc-10 g++-10 libgflags-dev
-      - run: CC=gcc-10 CXX=g++-10 V=1 SKIP_LINK=1 ROCKSDB_CXX_STANDARD=c++20 make -j16 all # Linking broken because libgflags compiled with newer ABI
+      - run: CC=gcc-10 CXX=g++-10 V=1 ROCKSDB_CXX_STANDARD=c++20 make -j16 all
       - post-steps
 
   build-linux-gcc-11-no_test_run:
@@ -433,7 +433,7 @@ jobs:
       - pre-steps
       - install-benchmark
       - run: sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test && sudo apt-get update -y && sudo apt-get install gcc-11 g++-11 libgflags-dev
-      - run: CC=gcc-11 CXX=g++-11 V=1 SKIP_LINK=1 make -j16 all microbench # Linking broken because libgflags compiled with newer ABI
+      - run: CC=gcc-11 CXX=g++-11 V=1 make -j16 all microbench
       - post-steps
 
   build-linux-clang-13-no_test_run: