Remove some unused variables

src/services/syntax/syntaxTree.ts

@@ -84,7 +84,6 @@ module TypeScript {
         private cacheSyntaxTreeInfo(): void {
             // If we're not keeping around the syntax tree, store the diagnostics and line
             // map so they don't have to be recomputed.
-            var sourceUnit = this.sourceUnit();
             var firstToken = firstSyntaxTreeToken(this);
             var leadingTrivia = firstToken.leadingTrivia(this.text);
 

src/services/syntax/syntaxTrivia.ts

@@ -150,7 +150,6 @@ module TypeScript.Syntax {
 
             // When we run into a newline for the first time, create the string builder and copy
             // all the values up to this newline into it.
-            var isCarriageReturnLineFeed = false;
             switch (ch) {
                 case CharacterCodes.carriageReturn:
                     if (i < triviaText.length - 1 && triviaText.charCodeAt(i + 1) === CharacterCodes.lineFeed) {