Revert "Add flutter_shared assets to module artifact (#23782)" (#26644)

This reverts commit 9880baa3.

Reason for revert: broke `--local-engine` command line option.

packages/flutter_tools/gradle/flutter.gradle

@@ -285,22 +285,6 @@ class FlutterPlugin implements Plugin<Project> {
         return "release"
     }
 
-    /**
-     * Returns a Flutter Jar file path suitable for the specified Android buildMode.
-     */
-    private File flutterJarFor(buildMode) {
-        if (buildMode == "profile") {
-            return profileFlutterJar
-        } else if (buildMode == "dynamicProfile") {
-            return dynamicProfileFlutterJar
-        } else if (buildMode == "dynamicRelease") {
-            return dynamicReleaseFlutterJar
-        } else if (buildMode == "debug") {
-            return debugFlutterJar
-        }
-        return releaseFlutterJar
-    }
-
     private void addFlutterTask(Project project) {
         if (project.state.failure) {
             return
@@ -405,21 +389,13 @@ class FlutterPlugin implements Plugin<Project> {
             // We know that the flutter app is a subproject in another Android app when these tasks exist.
             Task packageAssets = project.tasks.findByPath(":flutter:package${variant.name.capitalize()}Assets")
             Task cleanPackageAssets = project.tasks.findByPath(":flutter:cleanPackage${variant.name.capitalize()}Assets")
-            File chosenFlutterJar = flutterJarFor(flutterBuildMode)
-            Task copySharedFlutterAssetsTask = project.tasks.create(name: "copySharedFlutterAssets${variant.name.capitalize()}", type: Copy) {
-                from(project.zipTree(chosenFlutterJar))
-                include 'assets/flutter_shared/*'
-                into "src/${variant.name}"
-            }
             Task copyFlutterAssetsTask = project.tasks.create(name: "copyFlutterAssets${variant.name.capitalize()}", type: Copy) {
                 dependsOn flutterTask
-                dependsOn copySharedFlutterAssetsTask
                 dependsOn packageAssets ? packageAssets : variant.mergeAssets
                 dependsOn cleanPackageAssets ? cleanPackageAssets : "clean${variant.mergeAssets.name.capitalize()}"
                 into packageAssets ? packageAssets.outputDir : variant.mergeAssets.outputDir
                 with flutterTask.assets
             }
-
             if (packageAssets) {
                 // Only include configurations that exist in parent project.
                 Task mergeAssets = project.tasks.findByPath(":app:merge${variant.name.capitalize()}Assets")