Merge pull request #3621 from DickvdBrink/unused-vars

Remove unused variables

Author: mhegazy

src/compiler/checker.ts

@@ -3518,7 +3518,6 @@ namespace ts {
             let syntaxKind = kind === IndexKind.Number ? SyntaxKind.NumberKeyword : SyntaxKind.StringKeyword;
             let indexSymbol = getIndexSymbol(symbol);
             if (indexSymbol) {
-                let len = indexSymbol.declarations.length;
                 for (let decl of indexSymbol.declarations) {
                     let node = <SignatureDeclaration>decl;
                     if (node.parameters.length === 1) {
@@ -8374,12 +8373,12 @@ namespace ts {
         }
 
         function checkTypeOfExpression(node: TypeOfExpression): Type {
-            let operandType = checkExpression(node.expression);
+            checkExpression(node.expression);
             return stringType;
         }
 
         function checkVoidExpression(node: VoidExpression): Type {
-            let operandType = checkExpression(node.expression);
+            checkExpression(node.expression);
             return undefinedType;
         }
 
@@ -12380,7 +12379,6 @@ namespace ts {
 
                 case SyntaxKind.StringLiteral:
                     // External module name in an import declaration
-                    let moduleName: Expression;
                     if ((isExternalModuleImportEqualsDeclaration(node.parent.parent) &&
                         getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
                         ((node.parent.kind === SyntaxKind.ImportDeclaration || node.parent.kind === SyntaxKind.ExportDeclaration) &&

src/compiler/declarationEmitter.ts

@@ -40,7 +40,6 @@ namespace ts {
     function emitDeclarations(host: EmitHost, resolver: EmitResolver, diagnostics: Diagnostic[], jsFilePath: string, root?: SourceFile): DeclarationEmit {
         let newLine = host.getNewLine();
         let compilerOptions = host.getCompilerOptions();
-        let languageVersion = compilerOptions.target || ScriptTarget.ES3;
 
         let write: (s: string) => void;
         let writeLine: () => void;

src/compiler/parser.ts

@@ -5363,7 +5363,6 @@ namespace ts {
                     let atToken = createNode(SyntaxKind.AtToken, pos - 1);
                     atToken.end = pos;
 
-                    let startPos = pos;
                     let tagName = scanIdentifier();
                     if (!tagName) {
                         return;

src/compiler/program.ts

@@ -337,7 +337,6 @@ namespace ts {
         function processSourceFile(fileName: string, isDefaultLib: boolean, refFile?: SourceFile, refPos?: number, refEnd?: number) {
             let start: number;
             let length: number;
-            let extensions: string;
             let diagnosticArgument: string[];
             if (refEnd !== undefined && refPos !== undefined) {
                 start = refPos;

src/compiler/utilities.ts

@@ -1957,7 +1957,6 @@ namespace ts {
     function getExpandedCharCodes(input: string): number[] {
         let output: number[] = [];
         let length = input.length;
-        let leadSurrogate: number = undefined;
 
         for (let i = 0; i < length; i++) {
             let charCode = input.charCodeAt(i);

src/services/services.ts

@@ -95,7 +95,6 @@ namespace ts {
 
     export module ScriptSnapshot {
         class StringScriptSnapshot implements IScriptSnapshot {
-            private _lineStartPositions: number[] = undefined;
 
             constructor(private text: string) {
             }
@@ -2910,7 +2909,6 @@ namespace ts {
             }
 
             let location = getTouchingPropertyName(sourceFile, position);
-            var target = program.getCompilerOptions().target;
 
             let semanticStart = new Date().getTime();
             let isMemberCompletion: boolean;