ci(workflow): 移除docker构建中冗余的source命令

移除构建docker镜像和apidoc镜像步骤中不必要的source命令，这些环境变量已在workflow的其他部分设置

.gitea/workflows/docker.yaml

@@ -83,7 +83,6 @@ jobs:
 
       - name: Build and push docker image
         run: |
-          source ${{gitea.WORKSPACE}}/deploy/.env
           go clean -modcache
           go mod tidy
           make build-linux
@@ -93,7 +92,6 @@ jobs:
 
       - name: Build APIDOC docker image
         run: |
-          source ${{gitea.WORKSPACE}}/deploy/.env
           echo ${SERVICE_NAME}
           echo ${APIDOC_CONTAINER_NAME}
           echo ${SWAGGER_JSON}