Remove SingleJar from IJ project

It was removed because of #7365.

Closes #13370.

PiperOrigin-RevId: 369212525

scripts/ij.bazelproject

diff --git a/scripts/ij.bazelproject b/scripts/ij.bazelproject
index d499119..e35d2de 100644
--- a/scripts/ij.bazelproject
+++ b/scripts/ij.bazelproject
@@ -16,7 +16,6 @@
   //src/java_tools/buildjar/javatests/...
   //src/java_tools/junitrunner/java/com/google/testing/junit/runner:Runner
   //src/java_tools/junitrunner/javatests/...
-  //src/java_tools/singlejar:SingleJar
   //src/test/...
   //src/tools/remote/...
   //src/tools/starlark/...