remove extra import of SwiftOptions

Author: sina-mahdavi

Sources/SwiftDriver/ExplicitModuleBuilds/ExplicitDependencyBuildPlanner.swift

@@ -9,7 +9,6 @@
 // See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
 //
 //===----------------------------------------------------------------------===//
-import SwiftOptions
 
 import struct TSCBasic.SHA256
 import struct TSCBasic.AbsolutePath