refactor(spdx): Pull out a variable for later reuse

This keeps the diff smaller for an upcoming change.

Signed-off-by: Sebastian Schuberth <sebastian@doubleopen.org>

Author: sschuberth

plugins/reporters/spdx/src/main/kotlin/Extensions.kt

@@ -164,6 +164,8 @@ internal fun Package.toSpdxPackage(
         ortResult.getRepositoryLicenseChoices()
     )
 
+    val licenseDeclared = resolvedLicenseInfo.mainLicense()?.simplify()
+
     return SpdxPackage(
         spdxId = id.toSpdxId(type),
         checksums = when (type) {
@@ -194,8 +196,7 @@ internal fun Package.toSpdxPackage(
 
             else -> concludedLicense.nullOrBlankToSpdxNoassertionOrNone()
         },
-        licenseDeclared = resolvedLicenseInfo.mainLicense()
-            ?.simplify()
+        licenseDeclared = licenseDeclared
             ?.sorted()
             ?.nullOrBlankToSpdxNoassertionOrNone()
             ?: SpdxConstants.NONE,