Remove deprecated jsx-quotes

This was deprecated by f817e37 in September 2015 and was first released
in v3.4.0. Now that we are on 3.16.x, I think it is safe to finally
remove this deprecated rule.

README.md

@@ -89,7 +89,6 @@ Finally, enable all of the rules that you would like to use.
     "react/jsx-no-literals": 1,
     "react/jsx-no-undef": 1,
     "react/jsx-pascal-case": 1,
-    "react/jsx-quotes": 1,
     "react/jsx-sort-prop-types": 1,
     "react/jsx-sort-props": 1,
     "react/jsx-space-before-closing": 1,
@@ -134,7 +133,6 @@ Finally, enable all of the rules that you would like to use.
 * [jsx-no-literals](docs/rules/jsx-no-literals.md): Prevent usage of unwrapped JSX strings
 * [jsx-no-undef](docs/rules/jsx-no-undef.md): Disallow undeclared variables in JSX
 * [jsx-pascal-case](docs/rules/jsx-pascal-case.md): Enforce PascalCase for user-defined JSX components
-* [jsx-quotes](docs/rules/jsx-quotes.md): Enforce quote style for JSX attributes
 * [jsx-sort-prop-types](docs/rules/jsx-sort-prop-types.md): Enforce propTypes declarations alphabetical sorting
 * [jsx-sort-props](docs/rules/jsx-sort-props.md): Enforce props alphabetical sorting
 * [jsx-space-before-closing](docs/rules/jsx-space-before-closing.md): Validate spacing before closing bracket in JSX (fixable)

index.js

@@ -20,7 +20,6 @@ module.exports = {
     'jsx-pascal-case': require('./lib/rules/jsx-pascal-case'),
     'jsx-no-bind': require('./lib/rules/jsx-no-bind'),
     'jsx-no-undef': require('./lib/rules/jsx-no-undef'),
-    'jsx-quotes': require('./lib/rules/jsx-quotes'),
     'no-unknown-property': require('./lib/rules/no-unknown-property'),
     'jsx-curly-spacing': require('./lib/rules/jsx-curly-spacing'),
     'jsx-equals-spacing': require('./lib/rules/jsx-equals-spacing'),
@@ -61,7 +60,6 @@ module.exports = {
     'jsx-pascal-case': 0,
     'jsx-no-bind': 0,
     'jsx-no-undef': 0,
-    'jsx-quotes': 0,
     'no-unknown-property': 0,
     'jsx-curly-spacing': 0,
     'jsx-equals-spacing': 0,