This reverts CL 230024, commit
5e10ba996915f25e21808eee6baff950d2895634.
Reason for revert: breaks cmd/go TestScript/mod_retention
Change-Id: I2044beff3008156dd11d7bd8154a6208ae692c57
Reviewed-on: https://go-review.googlesource.com/c/go/+/230029
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
// - "go1.12", from Go version 1.12 onward
// - "go1.13", from Go version 1.13 onward
// - "go1.14", from Go version 1.14 onward
-// - "go1.15", from Go version 1.15 onward
// - any additional words listed in ctxt.BuildTags
//
// There are no build tags for beta or minor releases.
//
// When incrementing this, also add to the list at src/go/build/doc.go
// (search for "onward").
-const Version = 15
+const Version = 14