Update ci_install bazel version, removed duplicated code lines.

Author: jaeyoo

scripts/ci_install.sh

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # ==============================================================================
-wget https://github.com/bazelbuild/bazel/releases/download/3.7.2/bazel_3.7.2-linux-x86_64.deb
-sudo dpkg -i bazel_3.7.2-linux-x86_64.deb
+wget https://github.com/bazelbuild/bazel/releases/download/5.1.0/bazel_5.1.0-linux-x86_64.deb
+sudo dpkg -i bazel_5.1.0-linux-x86_64.deb
 pip install --upgrade pip setuptools wheel
 pip install -r requirements.txt

tensorflow_quantum/python/optimizers/spsa_minimizer.py

@@ -263,8 +263,6 @@ def _spsa_once(state):
                     "objective_value": current_obj
                 })
 
-                return [SPSAOptimizerResults(**next_state_params)]
-
             return [SPSAOptimizerResults(**next_state_params)]
 
         # The `state` here is a `SPSAOptimizerResults` tuple with