Fix lint errors

Author: amcasey

src/server/editorServices.ts

@@ -1518,13 +1518,13 @@ namespace ts.server {
             do {
                 const canonicalSearchPath = normalizedPathToPath(searchPath, this.currentDirectory, this.toCanonicalFileName);
                 const tsconfigFileName = asNormalizedPath(combinePaths(searchPath, "tsconfig.json"));
-                let tsResult = action(tsconfigFileName, combinePaths(canonicalSearchPath, "tsconfig.json"));
+                const tsResult = action(tsconfigFileName, combinePaths(canonicalSearchPath, "tsconfig.json"));
                 if (tsResult === ConfigFileActionResult.Return) {
                     return tsconfigFileName;
                 }
 
                 const jsconfigFileName = asNormalizedPath(combinePaths(searchPath, "jsconfig.json"));
-                let jsResult = action(jsconfigFileName, combinePaths(canonicalSearchPath, "jsconfig.json"));
+                const jsResult = action(jsconfigFileName, combinePaths(canonicalSearchPath, "jsconfig.json"));
                 if (jsResult === ConfigFileActionResult.Return) {
                     return jsconfigFileName;
                 }