Remove --disable-sandbox

This flag wasn’t used anywhere.

Author: ahoppen

SwiftSyntaxDevUtils/Sources/swift-syntax-dev-utils/common/BuildArguments.swift

@@ -39,9 +39,6 @@ struct BuildArguments: ParsableArguments {
   )
   var multirootDataFile: URL?
 
-  @Flag(help: "Disable sandboxes when building with SwiftPM")
-  var disableSandbox: Bool = false
-
   @Flag(help: "Build in release mode.")
   var release: Bool = false
 

SwiftSyntaxDevUtils/Sources/swift-syntax-dev-utils/common/BuildCommand.swift

@@ -59,10 +59,6 @@ extension BuildCommand {
       args += ["--multiroot-data-file", multirootDataFile]
     }
 
-    if arguments.disableSandbox {
-      args += ["--disable-sandbox"]
-    }
-
     if arguments.verbose {
       args += ["--verbose"]
     }