Revert "Support for external properties for UpgradeTransitiveDependencyVersion recipe (#5756)" (#5791)

* Revert "Support for external properties for UpgradeTransitiveDependencyVersion recipe (#5756)"

This reverts commit f015848.

* Polish

Author: jevanlingen

rewrite-gradle/src/main/java/org/openrewrite/gradle/UpgradeDependencyVersion.java

@@ -49,6 +49,7 @@
 import java.util.*;
 
 import static java.util.Collections.*;
+import static java.util.Objects.requireNonNull;
 
 @Value
 @EqualsAndHashCode(callSuper = false)
@@ -622,8 +623,8 @@ public J visitMethodInvocation(J.MethodInvocation method, ExecutionContext ctx)
                             ((J.MethodInvocation) depArgs.get(0)).getSimpleName().equals("enforcedPlatform"))) {
                     m = m.withArguments(ListUtils.mapFirst(depArgs, platform -> updateDependency((J.MethodInvocation) platform, ctx)));
                 }
-            } else if ("ext".equals(method.getSimpleName()) && getCursor().firstEnclosingOrThrow(SourceFile.class).getSourcePath().endsWith("settings.gradle")) {
-                // rare case that gradle versions are set via settings.gradle ext block (only possible for Groovy DSL)
+            } else if ("ext".equals(method.getSimpleName()) && isSettingsGradle()) {
+                // rare case that gradle versions are set via settings.gradle ext block
                 m = (J.MethodInvocation) new JavaIsoVisitor<ExecutionContext>() {
                     @Override
                     public J.Assignment visitAssignment(J.Assignment assignment, ExecutionContext executionContext) {
@@ -667,6 +668,11 @@ public J.Assignment visitAssignment(J.Assignment assignment, ExecutionContext ex
             return m;
         }
 
+        private boolean isSettingsGradle() {
+            String path = requireNonNull(getCursor().firstEnclosing(SourceFile.class)).getSourcePath().toString();
+            return path.endsWith("settings.gradle") || path.endsWith("settings.gradle.kts");
+        }
+
         private J.MethodInvocation updateDependency(J.MethodInvocation method, ExecutionContext ctx) {
             J.MethodInvocation m = method;
             m = m.withArguments(ListUtils.map(m.getArguments(), arg -> {