remove docker build cruft #1987

Job	Run time
compile_and_lint	1m 34s
test (mssql, mssql, mssql://root:Password123!@127.0.0.1/sqlpage)	1m 39s
test (postgres, postgres, postgres://root:Password123!@127.0.0.1/sqlpage)	1m 31s
docker_build (linux/arm/v7)	9m 40s
test (mysql, mysql, mysql://root:Password123!@127.0.0.1/sqlpage)	1m 23s
windows_test	2m 37s
test (odbc, postgres, Driver=PostgreSQL Unicode;Server=127.0.0.1;Port=5432;Database=sqlpage;UID=r...	1m 41s
docker_build (linux/arm64)	9m 42s
docker_build (linux/amd64)	8m 29s
docker_push	-1s
	38m 15s

Provide feedback