FE: Remove unused optional parameters on private methods

Analyzer will enforce this soon, for
#29731

Change-Id: Iaab4ee6a7c74f1b3f7d32787aecd860fef80f113
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/154687
Reviewed-by: Johnni Winther <[email protected]>
Commit-Queue: Samuel Rawlins <[email protected]>

Author: srawlins

pkg/front_end/lib/src/fasta/type_inference/type_inferrer.dart

@@ -1763,7 +1763,6 @@ class TypeInferrerImpl implements TypeInferrer {
       Arguments arguments,
       List<VariableDeclaration> hoistedExpressions,
       {bool isOverloadedArithmeticOperator: false,
-      bool isBinaryOperator: false,
       DartType receiverType,
       DartType returnType,
       bool skipTypeArgumentInference: false,

pkg/front_end/lib/src/fasta/util/textual_outline.dart

@@ -311,7 +311,7 @@ class TokenPrinter {
 
 String _textualizeClass(TextualOutlineListener listener, Token beginToken,
     Token endToken, _TextualOutlineState originalState,
-    {bool throwOnUnexpected: false, bool model: false}) {
+    {bool throwOnUnexpected: false}) {
   Token token = beginToken;
   TokenPrinter tokenPrinter = new TokenPrinter();
   // Class header.