Merge pull request googleapis#2876 from dhermes/datastore-rm-generated

Using `gapic-google-cloud-datastore-v1` instead of `datastore._generated`

Author: dhermes

Makefile.datastore

@@ -2,8 +2,6 @@
 branch = True
 
 [report]
-omit =
-    */_generated/*.py
 fail_under = 100
 show_missing = True
 exclude_lines =