From 8e1cebc8fce3a01c44528265987037f91c05609a Mon Sep 17 00:00:00 2001
From: xuwei-k <6b656e6a69@gmail.com>
Date: Sun, 7 Sep 2025 14:21:33 +0900
Subject: [PATCH] delete internal/ProjectMatrixReference.scala

---
 build.sbt                                                 | 3 +++
 .../main/scala/sbt/internal/ProjectMatrixReference.scala  | 8 --------
 2 files changed, 3 insertions(+), 8 deletions(-)
 delete mode 100644 main/src/main/scala/sbt/internal/ProjectMatrixReference.scala

diff --git a/build.sbt b/build.sbt
index 3dcd3dd76..2fb735144 100644
--- a/build.sbt
+++ b/build.sbt
@@ -735,6 +735,9 @@ lazy val mainProj = (project in file("main"))
     Compile / doc / sources := Nil,
     mimaSettings,
     mimaBinaryIssueFilters ++= Vector(
+      ProblemFilters.exclude[MissingClassProblem]("sbt.internal.LocalProjectMatrix"),
+      ProblemFilters.exclude[MissingClassProblem]("sbt.internal.LocalProjectMatrix$"),
+      ProblemFilters.exclude[MissingClassProblem]("sbt.internal.ProjectMatrixReference"),
       ProblemFilters.exclude[MissingClassProblem]("sbt.internal.ConfigData"),
       ProblemFilters.exclude[MissingClassProblem]("sbt.internal.ConfigData$"),
       ProblemFilters.exclude[MissingClassProblem]("sbt.internal.graph.backend.IvyReport"),
diff --git a/main/src/main/scala/sbt/internal/ProjectMatrixReference.scala b/main/src/main/scala/sbt/internal/ProjectMatrixReference.scala
deleted file mode 100644
index 5ed710cda..000000000
--- a/main/src/main/scala/sbt/internal/ProjectMatrixReference.scala
+++ /dev/null
@@ -1,8 +0,0 @@
-package sbt
-package internal
-
-/** Identifies a project matrix. */
-sealed trait ProjectMatrixReference
-
-/** Identifies a project in the current build context. */
-final case class LocalProjectMatrix(id: String) extends ProjectMatrixReference