Revert two Kernel changes that were causing test failures.

runtime/vm/kernel_binary_flowgraph.cc

Index: runtime/vm/kernel_binary_flowgraph.cc
diff --git a/runtime/vm/kernel_binary_flowgraph.cc b/runtime/vm/kernel_binary_flowgraph.cc
index cb33786cc5581da1b412bb3aa3c971d67b7e5896..34a20248b9bb9d8047dbf2d32c18c374395226b6 100644
--- a/runtime/vm/kernel_binary_flowgraph.cc
+++ b/runtime/vm/kernel_binary_flowgraph.cc
@@ -4225,18 +4225,6 @@ void StreamingFlowGraphBuilder::SkipLibraryTypedef() {
   SkipStringReference();         // read name index.
   ReadUInt();                    // read source_uri_index.
   SkipTypeParametersList();      // read type parameters.
-  ReadUInt();                    // read required parameter count
-
-  intptr_t positional_count = ReadListLength();
-  for (intptr_t i = 0; i < positional_count; i++) {
-    SkipVariableDeclaration();
-  }
-
-  intptr_t named_count = ReadListLength();
-  for (intptr_t i = 0; i < named_count; i++) {
-    SkipVariableDeclaration();
-  }
-
   SkipDartType();                // read type.
 }