Delete app jit or aot snapshots as each test is completed to reduce the amount of disk space requir…

tools/testing/dart/compiler_configuration.dart

Index: tools/testing/dart/compiler_configuration.dart
diff --git a/tools/testing/dart/compiler_configuration.dart b/tools/testing/dart/compiler_configuration.dart
index 4b5be7d19e9a3911d971ee5d6734e9be0cda6277..830f4401a1a83676040486518bc657745ca3b958 100644
--- a/tools/testing/dart/compiler_configuration.dart
+++ b/tools/testing/dart/compiler_configuration.dart
@@ -609,8 +609,9 @@ class PrecompilerCompilerConfiguration extends CompilerConfiguration {
     if (!useBlobs) {
       commands.add(this.computeAssembleCommand(tempDir, buildDir, CommandBuilder.instance,
           arguments, environmentOverrides));
-      commands.add(this.computeRemoveAssemblyCommand(tempDir, buildDir,
-          CommandBuilder.instance, arguments, environmentOverrides));
+      // This step reduces the amount of space needed to run the precompilation
+      // tests by 60%.
+      commands.add(commandBuilder.getDeleteCommand("$tempDir/out.S"));
     }
     return new CommandArtifact(commands, '$tempDir', 'application/dart-precompiled');
   }
@@ -697,27 +698,6 @@ class PrecompilerCompilerConfiguration extends CompilerConfiguration {
         bootstrapDependencies(buildDir), exec, args, environmentOverrides);
   }
 
-  // This step reduces the amount of space needed to run the precompilation
-  // tests by 60%.
-  CompilationCommand computeRemoveAssemblyCommand(
-      String tempDir,
-      String buildDir,
-      CommandBuilder commandBuilder,
-      List arguments,
-      Map<String, String> environmentOverrides) {
-    var exec = 'rm';
-    var args = ['$tempDir/out.S'];
-
-    return commandBuilder.getCompilationCommand(
-        'remove_assembly',
-        tempDir,
-        !useSdk,
-        bootstrapDependencies(buildDir),
-        exec,
-        args,
-        environmentOverrides);
-  }
-
   List<String> filterVmOptions(List<String> vmOptions) {
     var filtered = new List.from(vmOptions);
     filtered.removeWhere(