Remove useLineEndingsForPlatform flag

Nothing ever sets this flag, it was left over from moving tests over to use normalization by default.

Fixes #60234

Change-Id: I4a657838f488f73e09c898c89ccb33885d47cf79
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/459481
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Commit-Queue: Samuel Rawlins <srawlins@google.com>

Author: DanTup

pkg/analysis_server/test/analysis_server_base.dart

@@ -221,9 +221,6 @@ class PubPackageAnalysisServerTest extends ContextResolutionTest
 
   final String testPackageName = 'test';
 
-  /// Whether to automatically normalize line endings for the current platform.
-  bool useLineEndingsForPlatform = true;
-
   /// Return a list of the experiments that are to be enabled for tests in this
   /// class, an empty list if there are no experiments that should be enabled.
   List<String> get experiments => experimentsForTests;
@@ -277,9 +274,7 @@ class PubPackageAnalysisServerTest extends ContextResolutionTest
 
   // TODO(scheglov): rename
   void addTestFile(String content) {
-    parsedTestCode = useLineEndingsForPlatform
-        ? TestCode.parseNormalized(content)
-        : TestCode.parse(content);
+    parsedTestCode = TestCode.parseNormalized(content);
     newFile(testFilePath, parsedTestCode.code);
   }
 
@@ -322,9 +317,7 @@ class PubPackageAnalysisServerTest extends ContextResolutionTest
 
   @override
   File newFile(String path, String content) {
-    if (useLineEndingsForPlatform) {
-      content = normalizeNewlinesForPlatform(content);
-    }
+    content = normalizeNewlinesForPlatform(content);
     return super.newFile(path, content);
   }
 

pkg/analysis_server/test/client/completion_driver_test.dart

@@ -76,9 +76,7 @@ abstract class AbstractCompletionDriverTest
   @override
   @protected
   Future<List<CompletionSuggestion>> addTestFile(String content) async {
-    if (useLineEndingsForPlatform) {
-      content = normalizeNewlinesForPlatform(content);
-    }
+    content = normalizeNewlinesForPlatform(content);
     driver.addTestFile(content);
 
     // Wait after adding the test file, this might affect diagnostics.

pkg/analysis_server/test/domain_completion_util.dart

@@ -83,9 +83,7 @@ class AbstractCompletionDomainTest extends PubPackageAnalysisServerTest {
     required String content,
     int maxResults = 1 << 10,
   }) async {
-    var code = useLineEndingsForPlatform
-        ? TestCode.parseNormalized(content)
-        : TestCode.parse(content);
+    var code = TestCode.parseNormalized(content);
     var completionOffset = code.position.offset;
 
     newFile(path, code.code);