Merge pull request #7316 from jasonmalinowski/remove-unneeded-project.lock.json-file

Delete build/ToolsetPackages/project.lock.json

build/ToolsetPackages/.gitignore

+# The project.json in this directory exists simply to download packages; since
+# nothing will ever read the project.lock.json here, we should not check them
+# in
+
+project.lock.json