analyzer: Remove deprecated reportLintForOffset and reportLintForToken

Change-Id: I7862b8984c7fa62dffacb1d17f4ef06be151a46c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/425141
Commit-Queue: Samuel Rawlins <[email protected]>
Reviewed-by: Konstantin Shcheglov <[email protected]>

Author: srawlins

pkg/analyzer/lib/src/lint/linter.dart

@@ -343,34 +343,6 @@ abstract class LintRule {
     contextMessages: contextMessages,
     errorCode: errorCode,
   );
-
-  @Deprecated('Use reportAtOffset instead')
-  void reportLintForOffset(
-    int offset,
-    int length, {
-    List<Object> arguments = const [],
-    List<DiagnosticMessage>? contextMessages,
-    ErrorCode? errorCode,
-  }) => reportAtOffset(
-    offset,
-    length,
-    arguments: arguments,
-    contextMessages: contextMessages,
-    errorCode: errorCode,
-  );
-
-  @Deprecated('Use reportAtToken')
-  void reportLintForToken(
-    Token token, {
-    List<Object> arguments = const [],
-    List<DiagnosticMessage>? contextMessages,
-    ErrorCode? errorCode,
-  }) => reportAtToken(
-    token,
-    arguments: arguments,
-    contextMessages: contextMessages,
-    errorCode: errorCode,
-  );
 }
 
 /// Provides access to information needed by lint rules that is not available