No need for python-dev in the base image

Now that #38 is done, no compiled extension modules -> no python-dev
8 jobs for 14-c-fortran-bindings in 5 minutes and 25 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build
passed #38206
manual
build_docker_base

00:02:15

 
  Test
passed #38210
build_test_cmake

00:00:40

passed #38209
test_lint

00:00:25

passed #38213
test_py3

00:02:02

passed #38207
build_test_cmake

00:00:18

canceled #38208
test_py3

00:01:24

failed #38212
test_py3

00:02:36

failed #38211
test_py3

00:02:49