CI: Remove unit tests from valgrind build to avoid compilation error

Signed-off-by: Hanxi Zhang <hanxizh@amazon.com>

Author: hanxizh9910

.github/workflows/ci.yml

@@ -119,7 +119,7 @@ jobs:
     steps:
       - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - name: make
-        run: make valgrind all-with-unit-tests SERVER_CFLAGS='-Werror'
+        run: make valgrind SERVER_CFLAGS='-Werror'
       - name: testprep
         run: |
           sudo apt-get update