Remove imports from symbols (microsoft#1951)

Author: jakebailey

src/LanguageServer/Impl/Indexing/SymbolIndexWalker.cs

@@ -124,28 +124,6 @@ private void GetKinds(FunctionDefinition node, out SymbolKind symbolKind, out st
             }
         }
 
-        public override bool Walk(ImportStatement node) {
-            foreach (var (nameNode, nameString) in node.Names.Zip(node.AsNames, (name, asName) => asName != null ? (asName, asName.Name) : ((Node)name, name.MakeString()))) {
-                var span = nameNode.GetSpan(_ast);
-                _stack.AddSymbol(new HierarchicalSymbol(nameString, SymbolKind.Module, span, existInAllVariable: ExistInAllVariable(nameString)));
-            }
-
-            return false;
-        }
-
-        public override bool Walk(FromImportStatement node) {
-            if (node.IsFromFuture) {
-                return false;
-            }
-
-            foreach (var name in node.Names.Zip(node.AsNames, (name, asName) => asName ?? name)) {
-                var span = name.GetSpan(_ast);
-                _stack.AddSymbol(new HierarchicalSymbol(name.Name, SymbolKind.Module, span, existInAllVariable: ExistInAllVariable(name.Name)));
-            }
-
-            return false;
-        }
-
         public override bool Walk(AssignmentStatement node) {
             WalkIfNotLibraryMode(node.Right);
 

src/LanguageServer/Test/SymbolIndexWalkerTests.cs

@@ -196,14 +196,7 @@ from os.path import ( join as osjoin2, exists as osexists, expanduser )
 ";
 
             var symbols = WalkSymbols(code);
-            symbols.Should().BeEquivalentToWithStrictOrdering(new[] {
-                new HierarchicalSymbol("sys", SymbolKind.Module, new SourceSpan(1, 8, 1, 11)),
-                new HierarchicalSymbol("np", SymbolKind.Module, new SourceSpan(2, 17, 2, 19)),
-                new HierarchicalSymbol("osjoin", SymbolKind.Module, new SourceSpan(3, 29, 3, 35)),
-                new HierarchicalSymbol("osjoin2", SymbolKind.Module, new SourceSpan(4, 31, 4, 38)),
-                new HierarchicalSymbol("osexists", SymbolKind.Module, new SourceSpan(4, 50, 4, 58)),
-                new HierarchicalSymbol("expanduser", SymbolKind.Module, new SourceSpan(4, 60, 4, 70)),
-            });
+            symbols.Should().BeEmpty();
         }
 
         [TestMethod, Priority(0)]