Revert "Merge pull request #2444 from bennerv/add-dockerignore"

This reverts commit 485c17117f, reversing
changes made to d6d376477b.

.dockerignore

@@ -1,20 +0,0 @@
-__pycache__
-gomock_reflect_*
-/.vscode
-/*.kubeconfig
-/dev-config.yaml
-/env*
-/env.example
-/env-int.example
-/id_rsa
-/pyenv*
-/mdm_statsd.socket
-/uts.txt
-/cover.out
-/coverage.*
-/report.xml
-**/*.swp
-.idea*
-cmd/aro/__debug_bin
-python/az/aro/build
-python/az/aro/dist