Removed reference counting from IncrementalBuilder; now relies on GC.#6863

Merged

TIHan merged 11 commits intodotnet:masterfrom

TIHan:tcimports-finalizer-master

May 31, 2019

Commits on May 23, 2019

TcImports doesn't explicitly have to be disposed, relies on GC. Removed reference counting in incremental builder. Builders can only be invalidated by a type provider, not anything else.
TIHan
committed

Commits on May 24, 2019

Removing any notion of being incremental builder reference counting and being alive
TIHan
committed

Commits on May 30, 2019