Revert "Make patch file import declarations apply to the patched library too."

lib/compiler/implementation/library_map.dart

Index: lib/compiler/implementation/library_map.dart
diff --git a/lib/compiler/implementation/library_map.dart b/lib/compiler/implementation/library_map.dart
index 028d0e66e30b81dfb394f9fd6654eea88f4ed247..091fd9c4836f32a5266545a5d71904825e1c9011 100644
--- a/lib/compiler/implementation/library_map.dart
+++ b/lib/compiler/implementation/library_map.dart
@@ -41,13 +41,11 @@ final Map<String,LibraryPatchPath> DART2JS_LIBRARY_MAP
       "lib/isolate/isolate_leg.dart", null),
   "json": const LibraryPatchPath(
       "lib/json/json.dart", null),
-  "math": const LibraryPatchPath(
-      "lib/math/math.dart",
-      "lib/compiler/implementation/lib/math.dartp"),
   "uri": const LibraryPatchPath(
       "lib/uri/uri.dart", null),
   "utf": const LibraryPatchPath(
       "lib/utf/utf.dart", null),
   "web": const LibraryPatchPath(
-      "lib/web/web.dart", null),
+      "lib/compiler/implementation/lib/web.dart",
+      "lib/compiler/implementation/lib/web.dartp"),
 };