[Android] Remove vestigial isolate_file logic from instrumentation_test_apk.

build/config/android/rules.gni

Index: build/config/android/rules.gni
diff --git a/build/config/android/rules.gni b/build/config/android/rules.gni
index 9894b5a72cd740701138278a9fd0fc9c5a7008d2..ba0c2100e1adfe244e79068fe9865581d228d965 100644
--- a/build/config/android/rules.gni
+++ b/build/config/android/rules.gni
@@ -2239,7 +2239,6 @@ if (enable_java_templates) {
   #     libraries depend on other shared_library targets, those dependencies will
   #     also be included in the apk (e.g. for is_component_build).
   #   apk_under_test: The apk being tested.
-  #   isolate_file: Isolate file containing the list of test data dependencies.
   #
   # Example
   #   instrumentation_test_apk("foo_test_apk") {
@@ -2274,10 +2273,6 @@ if (enable_java_templates) {
       output = _device_isolate_path
     }
 
-    if (defined(invoker.isolate_file)) {
-      assert(invoker.isolate_file != "")
-    }
-
     test_runner_script(_test_runner_target_name) {
       forward_variables_from(invoker,
                              [
@@ -2352,17 +2347,6 @@ if (enable_java_templates) {
       if (defined(invoker.apk_under_test)) {
         public_deps += [ invoker.apk_under_test ]
       }
-      if (defined(invoker.isolate_file)) {
-        isolate_values = exec_script("//build/gypi_to_gn.py",
-                                     [
-                                       rebase_path(invoker.isolate_file),
-                                       "--replace",
-                                       "<(DEPTH)=/",
-                                     ],
-                                     "scope",
-                                     [ invoker.isolate_file ])
-        data = isolate_values.files
-      }
     }
 
     # TODO: Delete once recipes no longer use this target.