Drop support for configuration via package.json

docs/usage/tslint-json/index.md

@@ -28,7 +28,7 @@ An example `tslint.json` file might look like this:
 
 ```ts
 {
-    "rulesDirectory": ["path/to/custom/rules/direcotry/", "another/path/"],
+    "rulesDirectory": ["path/to/custom/rules/directory/", "another/path/"],
     "rules": {
         "class-name": true,
         "comment-format": [true, "check-space"],

src/configuration.ts

@@ -69,9 +69,6 @@ export const DEFAULT_CONFIG = {
 };
 /* tslint:enable:object-literal-key-quotes */
 
-const PACKAGE_DEPRECATION_MSG = "Configuration of TSLint via package.json has been deprecated, "
-    + "please start using a tslint.json file instead (http://palantir.github.io/tslint/usage/tslint-json/).";
-
 const BUILT_IN_CONFIG = /^tslint:(.*)$/;
 
 /**
@@ -93,7 +90,7 @@ export function findConfiguration(configFile: string, inputFilePath: string): IC
  * the location of the config file is not known and you want to search for one.
  * @param inputFilePath A path to the current file being linted. This is the starting location
  * of the search for a configuration.
- * @returns An absolute path to a tslint.json file, a path to a package.json file with a tslintConfig field
+ * @returns An absolute path to a tslint.json file
  * or undefined if neither can be found.
  */
 export function findConfigurationPath(suppliedConfigFilePath: string, inputFilePath: string) {
@@ -110,12 +107,6 @@ export function findConfigurationPath(suppliedConfigFilePath: string, inputFileP
             return path.resolve(configFilePath);
         }
 
-        // search for package.json with tslintConfig property
-        configFilePath = findup("package.json", { cwd: inputFilePath, nocase: true });
-        if (configFilePath != null && require(configFilePath).tslintConfig != null) {
-            return path.resolve(configFilePath);
-        }
-
         // search for tslint.json in home directory
         const homeDir = getHomeDir();
         if (homeDir != null) {
@@ -141,9 +132,6 @@ export function findConfigurationPath(suppliedConfigFilePath: string, inputFileP
 export function loadConfigurationFromPath(configFilePath: string): IConfigurationFile {
     if (configFilePath == null) {
         return DEFAULT_CONFIG;
-    } else if (path.basename(configFilePath) === "package.json") {
-        console.warn(PACKAGE_DEPRECATION_MSG);
-        return require(configFilePath).tslintConfig;
     } else {
         const resolvedConfigFilePath = resolveConfigurationPath(configFilePath);
         let configFile: IConfigurationFile;