Revert "Run Kotlin tests on 1.6 and 1.8 target versions"

This reverts commit f92ad05c4fd126f5760fd989ee096d79b426f668.

Reason for revert: fails on Windows due to dx incompatibility

Bug: 71894643
Change-Id: Id7fcbc3a8f66b552c8b8ec24d19023bccca6681b
diff --git a/build.gradle b/build.gradle
index af7bb41..e0d28fa 100644
--- a/build.gradle
+++ b/build.gradle
@@ -793,33 +793,25 @@
         include "**/*.class"
     }
     def kotlinResourcesDir = file("src/test/debugTestResourcesKotlin")
-    kotlin.Kotlinc.KotlinTargetVersion.values().each { kotlinTargetVersion ->
-        def kotlinHostJar = "debug_test_resources_kotlin_${kotlinTargetVersion}.jar"
-        def taskName = "jar_debugTestResourcesKotlin_${kotlinTargetVersion}"
-        task "$taskName"(type: kotlin.Kotlinc) {
-            source = fileTree(dir: kotlinResourcesDir, include: '**/*.kt')
-            destination = file("build/test/${kotlinHostJar}")
-            targetVersion = kotlinTargetVersion;
-        }
-        dependsOn taskName
+    def kotlinHostJar = "debug_test_resources_kotlin.jar"
+    task "jar_debugTestResourcesKotlin"(type: kotlin.Kotlinc) {
+        source = fileTree(dir: kotlinResourcesDir, include: '**/*.kt')
+        destination = file("build/test/${kotlinHostJar}")
     }
     dependsOn downloadDeps
     dependsOn jar_debugTestResources
     dependsOn jar_debugTestResourcesJava8
+    dependsOn jar_debugTestResourcesKotlin
 }
 
 task buildExampleKotlinJars {
     def kotlinSrcDir = file("src/test/examplesKotlin")
     kotlinSrcDir.eachDir { dir ->
-        kotlin.Kotlinc.KotlinTargetVersion.values().each { kotlinTargetVersion ->
-            def name = dir.getName();
-            def taskName = "compile_example_kotlin_${name}_${kotlinTargetVersion}"
-            dependsOn taskName
-            task "${taskName}"(type: kotlin.Kotlinc) {
-                source = fileTree(dir: file("src/test/examplesKotlin/${name}"), include: '**/*.kt')
-                destination = file("build/test/examplesKotlin/${kotlinTargetVersion}/${name}.jar")
-                targetVersion = kotlinTargetVersion;
-            }
+        def name = dir.getName();
+        dependsOn "compile_example_kotlin_${name}"
+        task "compile_example_kotlin_${name}"(type: kotlin.Kotlinc) {
+            source = fileTree(dir: file("src/test/examplesKotlin/${name}"), include: '**/*.kt')
+            destination = file("build/test/examplesKotlin/${name}.jar")
         }
     }
 }
@@ -1123,23 +1115,20 @@
     }
     def examplesDir = file("src/test/examplesKotlin")
     examplesDir.eachDir { dir ->
-        kotlin.Kotlinc.KotlinTargetVersion.values().each { kotlinTargetVersion ->
-            def name = dir.getName();
-            def compileTaskName = "compile_example_kotlin_${name}_${kotlinTargetVersion}"
-            def dexTaskName = "dex_example_kotlin_${name}_${kotlinTargetVersion}"
-            dependsOn dexTaskName
-            def exampleOutputDir = file("build/test/examplesKotlin/${kotlinTargetVersion}/" + name);
-            def dexPath = file("${exampleOutputDir}")
-            task "${dexTaskName}"(type: dx.Dx, dependsOn: "${compileTaskName}") {
-                doFirst {
-                    if (!dexPath.exists()) {
-                        dexPath.mkdirs()
-                    }
+        def name = dir.getName();
+        dependsOn "dex_example_kotlin_${name}"
+        def exampleOutputDir = file("build/test/examplesKotlin/" + name);
+        def dexPath = file("${exampleOutputDir}")
+        task "dex_example_kotlin_${name}"(type: dx.Dx,
+                dependsOn: "compile_example_kotlin_${name}") {
+            doFirst {
+                if (!dexPath.exists()) {
+                    dexPath.mkdirs()
                 }
-                source = files(tasks.getByPath("${compileTaskName}")).asFileTree
-                destination = dexPath
-                debug = false
             }
+            source = files(tasks.getByPath("compile_example_kotlin_${name}")).asFileTree
+            destination = dexPath
+            debug = false
         }
     }
 }