Revert "Add: Reference for `collecting functions`"
Revert "Add: Reference for `collecting functions`"

This reverts commit 18eb8b904eee51873ed34c3447c02996b048525a.
It had no effect on the build.

stweil/documentation-generator,michaelclelland/documentation-generator,nickanderson/documentation-generator,stweil/documentation-generator,nickanderson/documentation-generator,michaelclelland/documentation-generator,nickanderson/documentation-generator,stweil/documentation-generator,cfengine/documentation-generator,michaelclelland/documentation-generator,nickanderson/documentation-generator,cfengine/documentation-generator,michaelclelland/documentation-generator,cfengine/documentation-generator,cfengine/documentation-generator,stweil/documentation-generator,stweil/documentation-generator,cfengine/documentation-generator,michaelclelland/documentation-generator,nickanderson/documentation-generator