fix: do not add scala.util.Properties as the Main-Class in the Manifest

Author: hamzaremmal

project/Build.scala

@@ -1257,7 +1257,8 @@ object Build {
       // Should we also patch .sjsir files
       keepSJSIR := false,
       // Generate library.properties, used by scala.util.Properties
-      Compile / resourceGenerators += generateLibraryProperties.taskValue
+      Compile / resourceGenerators += generateLibraryProperties.taskValue,
+      mainClass := None,
     )
 
   /* Configuration of the org.scala-lang:scala3-library_3:*.**.**-nonbootstrapped project */
@@ -1299,6 +1300,7 @@ object Build {
       publish / skip := false,
       // Project specific target folder. sbt doesn't like having two projects using the same target folder
       target := target.value / "scala3-library-nonbootstrapped",
+      mainClass := None,
     )
 
   /* Configuration of the org.scala-lang:scala-library:*.**.**-bootstrapped project */
@@ -1378,6 +1380,7 @@ object Build {
       // Generate Scala 3 runtime properties overlay
       Compile / resourceGenerators += generateLibraryProperties.taskValue,
       bspEnabled := false,
+      mainClass := None,
     )
 
   /* Configuration of the org.scala-lang:scala3-library_3:*.**.**-bootstrapped project */
@@ -1422,6 +1425,7 @@ object Build {
       // Project specific target folder. sbt doesn't like having two projects using the same target folder
       target := target.value / "scala3-library-bootstrapped",
       bspEnabled := false,
+      mainClass := None,
     )
 
   /* Configuration of the org.scala-js:scalajs-scalalib_2.13:*.**.**-bootstrapped project */
@@ -1552,6 +1556,7 @@ object Build {
       // Should we also patch .sjsir files
       keepSJSIR := true,
       bspEnabled := false,
+      mainClass := None,
     )
 
   /* Configuration of the org.scala-lang:scala3-library_sjs1_3:*.**.**-bootstrapped project */
@@ -1594,6 +1599,7 @@ object Build {
       // Project specific target folder. sbt doesn't like having two projects using the same target folder
       target := target.value / "scala3-library",
       bspEnabled := false,
+      mainClass := None,
     )
 
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