Remove patch files from root directory

I didn't mean to check these in.

engine/src/flutter/bar.patch

@@ -1,32 +0,0 @@
-commit 2f12ff08cc9215273040893a9b6c2b3fabccfb6b
-Author: Adam Barth <abarth@chromium.org>
-Date:   Thu Jul 16 18:00:01 2015 -0700
-
-    Cherry-pick build fix from Mojo
-
-diff --git a/services/android/rules.gni b/services/android/rules.gni
-index 350b421..c2c286b 100644
---- a/services/android/rules.gni
-+++ b/services/android/rules.gni
-@@ -44,6 +44,10 @@ template("mojo_android_java_application") {
-   action(android_with_manifest_name) {
-     script = "${servicess_android_path}/add_manifest_entry.py"
- 
-+    deps = [
-+      ":$android_standalone_name"
-+    ]
-+
-     input = dex_output_path
-     inputs = [
-       input,
-@@ -74,6 +78,10 @@ template("mojo_android_java_application") {
-   action(target_name) {
-     script = rebase_path("mojo/public/tools/prepend.py", ".", mojo_root)
- 
-+    deps = [
-+      ":$android_with_manifest_name"
-+    ]
-+
-     input = dex_with_manifest_output_path
-     inputs = [
-       input,

engine/src/flutter/foo.patch

@@ -1,56 +0,0 @@
-commit 2f12ff08cc9215273040893a9b6c2b3fabccfb6b
-Author: Adam Barth <abarth@chromium.org>
-Date:   Thu Jul 16 18:00:01 2015 -0700
-
-    Improve dependencies
-
-diff --git a/sky/build/sky_app.gni b/sky/build/sky_app.gni
-index 950bf82..6890cf6 100644
---- a/sky/build/sky_app.gni
-+++ b/sky/build/sky_app.gni
-@@ -28,7 +28,7 @@ template("sky_app") {
- 
-     bundle_prefix = target_name
- 
--    copy("copy_${bundle_prefix}_bundle") {
-+    copy("gen_${bundle_prefix}_bundle") {
-       sources = [
-         "$target_gen_dir/app.skyx",
-       ]
-@@ -50,16 +50,20 @@ template("sky_app") {
-         "$target_gen_dir/app.skyx",
-       ]
-       deps = [
--        "//third_party/icu",
--        ":copy_${bundle_prefix}_bundle",
-+        ":$skyx_target_name",
-+        ":gen_${bundle_prefix}_bundle",
-+        "//third_party/icu:icudata",
-       ]
- 
-       if (defined(invoker.bundles)) {
-         foreach(bundle, invoker.bundles) {
-           bundle_gen_dir = get_label_info(bundle, "target_gen_dir")
-+          bundle_dir = get_label_info(bundle, "dir")
-           bundle_name = get_label_info(bundle, "name")
-           sources += [ "$bundle_gen_dir/${bundle_name}.skyx" ]
--          deps += [ bundle ]
-+          deps += [
-+            "$bundle_dir:gen_${bundle_name}_bundle",
-+          ]
-         }
-       }
-     }
-diff --git a/sky/shell/BUILD.gn b/sky/shell/BUILD.gn
-index 88c9d68..ae169d3 100644
---- a/sky/shell/BUILD.gn
-+++ b/sky/shell/BUILD.gn
-@@ -136,7 +136,7 @@ if (is_android) {
-       "$root_build_dir/icudtl.dat",
-     ]
-     deps = [
--      "//third_party/icu",
-+      "//third_party/icu:icudata",
-     ]
-   }
- } else if (is_ios) {