Remove unused analysisContext from completion request and contributors

pkg/analysis_server/lib/src/services/completion/completion_core.dart

Index: pkg/analysis_server/lib/src/services/completion/completion_core.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/completion_core.dart b/pkg/analysis_server/lib/src/services/completion/completion_core.dart
index a8ecb318baaefde9cab732fa8cf561f1e258202a..f9e1e2377940d2e87d55ece8bc2a4bd87110a223 100644
--- a/pkg/analysis_server/lib/src/services/completion/completion_core.dart
+++ b/pkg/analysis_server/lib/src/services/completion/completion_core.dart
@@ -9,7 +9,6 @@ import 'package:analysis_server/src/provisional/completion/completion_core.dart'
 import 'package:analysis_server/src/services/completion/completion_performance.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/dart/analysis/driver.dart';
-import 'package:analyzer/src/generated/engine.dart' hide AnalysisResult;
 import 'package:analyzer/src/generated/source.dart';
 
 /**
@@ -20,19 +19,8 @@ class CompletionRequestImpl implements CompletionRequest {
   final AnalysisResult result;
 
   @override
-  final AnalysisContext context;
-
-  @override
   final Source source;
 
-  /**
-   * The content cache modification stamp of the associated [source],
-   * or `null` if the content cache does not override the [source] content.
-   * This is used to determine if the [source] contents have been modified
-   * after the completion request was made.
-   */
-  final int sourceModificationStamp;
-
   @override
   final int offset;
 
@@ -67,31 +55,15 @@ class CompletionRequestImpl implements CompletionRequest {
   /**
    * Initialize a newly created completion request based on the given arguments.
    */
-  CompletionRequestImpl(
-      this.result,
-      AnalysisContext context,
-      this.resourceProvider,
-      Source source,
-      int offset,
-      this.performance,
-      this.ideOptions)
-      : this.context = context,
-        this.source = source,
+  CompletionRequestImpl(this.result, this.resourceProvider, Source source,
+      int offset, this.performance, this.ideOptions)
+      : this.source = source,
         this.offset = offset,
         replacementOffset = offset,
-        replacementLength = 0,
-        sourceModificationStamp = context?.getModificationStamp(source);
-
-  /**
-   * Return the original text from the [replacementOffset] to the [offset]
-   * that can be used to filter the suggestions on the server side.
-   */
-  String get filterText {
-    return sourceContents.substring(replacementOffset, offset);
-  }
+        replacementLength = 0;
 
   @override
-  String get sourceContents => context.getContents(source)?.data;
+  String get sourceContents => result.content;
 
   /**
    * Abort the current completion request.
@@ -105,9 +77,5 @@ class CompletionRequestImpl implements CompletionRequest {
     if (_aborted) {
       throw new AbortCompletion();
     }
-    if (sourceModificationStamp != context?.getModificationStamp(source)) {
-      _aborted = true;
-      throw new AbortCompletion();
-    }
   }
 }