internal/source: delete git.pirl.io test

git.pirl.io/community/pirl no longer exists, so running
`go test -run TestModuleInfo -record` will always return a 500 for that
path.

In order to update internal/source/testdata/TestModuleInfo.replay for
future tests, this test is deleted.

Change-Id: I8978bb8a725959896c1897e4178a5b8d6f4f51c2
Reviewed-on: https://go-review.googlesource.com/c/pkgsite/+/318969
Trust: Julie Qiu <julie@golang.org>
Run-TryBot: Julie Qiu <julie@golang.org>
TryBot-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Jonathan Amsterdam <jba@google.com>

internal/source/source_test.go

@@ -263,16 +263,6 @@ func TestModuleInfo(t *testing.T) {
 			"https://git.fd.io/govpp/tree/doc.go?id=f04939006063#n1",
 			"https://git.fd.io/govpp/plain/doc.go?id=f04939006063",
 		},
-		{
-			"git.pirl.io",
-			"git.pirl.io/community/pirl", "1.8.27-damocles", "rpc/doc.go",
-
-			"https://git.pirl.io/community/pirl",
-			"https://git.pirl.io/community/pirl/-/tree/1.8.27-damocles",
-			"https://git.pirl.io/community/pirl/-/blob/1.8.27-damocles/rpc/doc.go",
-			"https://git.pirl.io/community/pirl/-/blob/1.8.27-damocles/rpc/doc.go#L1",
-			"https://git.pirl.io/community/pirl/-/raw/1.8.27-damocles/rpc/doc.go",
-		},
 		{
 			"gitea",
 			"gitea.com/azhai/xorm", "v1.0.3", "log/logger.go",