Revert "Delete app jit or aot snapshots as each test is completed to reduce the amount of disk spac…

tools/testing/dart/runtime_configuration.dart

Index: tools/testing/dart/runtime_configuration.dart
diff --git a/tools/testing/dart/runtime_configuration.dart b/tools/testing/dart/runtime_configuration.dart
index 5a54d0b6aaf7a1ecaa4d89063a81841ecff79b71..d0b90f031a47e409f34b527ceaca7a55df16b1c1 100644
--- a/tools/testing/dart/runtime_configuration.dart
+++ b/tools/testing/dart/runtime_configuration.dart
@@ -237,17 +237,9 @@ class StandaloneDartRuntimeConfiguration extends DartVmRuntimeConfiguration {
       throw "Dart VM cannot run files of type '$type'.";
     }
     String executable = suite.dartVmBinaryFileName;
-    var commands = new List<Command>();
-    commands.add(commandBuilder.getVmCommand(executable,
-                                             arguments,
-                                             environmentOverrides,
-                                             needsDFERunner: needsDFERunner));
-    if (type == 'application/dart-snapshot') {
-      // Delete snapshots as we go to reduce the space required to run the test
-      // suite.
-      commands.add(commandBuilder.getDeleteCommand(script));
-    }
-    return commands;
+    return <Command>[
+      commandBuilder.getVmCommand(executable, arguments, environmentOverrides, needsDFERunner: needsDFERunner)
+    ];
   }
 }
 
@@ -290,13 +282,10 @@ class DartPrecompiledRuntimeConfiguration extends DartVmRuntimeConfiguration {
       throw "dart_precompiled cannot run files of type '$type'.";
     }
 
-    var commands = new List<Command>();
-    commands.add(commandBuilder.getVmCommand(suite.dartPrecompiledBinaryFileName,
-                                             arguments, environmentOverrides));
-    // Delete snapshots (dylibs or blobs) as we go to reduce the space required
-    // to run the test suite.
-    commands.add(commandBuilder.getDeleteCommand(script));
-    return commands;
+    return <Command>[
+      commandBuilder.getVmCommand(suite.dartPrecompiledBinaryFileName,
+          arguments, environmentOverrides)
+    ];
   }
 }