Try un-pinning manylinux2010 image
Getting the following inexplicable error on build:
```
,##[error]The remote provider was unable to process the request.
Pool: Azure Pipelines
Image: Ubuntu16
```
@@ -33,7 +33,7 @@ stages:
- template: azure-libtiledb-darwin.yml
- job: build1_libtiledb_on_linux
- container: quay.io/pypa/manylinux2010_x86_64:2021-06-07-00faba2
+ container: quay.io/pypa/manylinux2010_x86_64
variables:
CXXFLAGS: "-Wno-unused-parameter -lrt -DKJ_USE_EPOLL10 -D__BIONIC__=1"
CFLAGS: "-Wno-unused-parameter -lrt -DKJ_USE_EPOLL=0 -D__BIONIC__=1"
