remove a condition (based on .jbWebExistsMarker file) for js tests tasks (#1848)

Co-authored-by: Oleksandr Karpovich <oleksandr.karpovich@jetbrains.com>

compose/build.gradle.kts

@@ -16,8 +16,6 @@ open class ComposePublishingTask : AbstractComposePublishingTask() {
 }
 
 val composeProperties = ComposeProperties(project)
-val isWebExist =
-    project.composeBuild?.run { projectDir.resolve(".jbWebExistsMarker").exists() } ?: false
 
 val mainComponents =
     listOf(
@@ -118,11 +116,9 @@ tasks.register("testComposeJbDesktop") {
     dependsOnComposeTask(":compose:runtime:runtime-saveable:desktopTest")
 }
 
-if (isWebExist) {
+tasks.register("testComposeJbWeb") {
-    tasks.register("testComposeJbWeb") {
     dependsOnComposeTask(":compose:runtime:runtime:jsTest")
     dependsOnComposeTask(":compose:runtime:runtime:test")
-    }
 }
 
 tasks.register("buildNativeDemo") {