Remove ENABLE(ES6_TEMPLATE_LITERAL_SYNTAX) guards

Remove ENABLE(ES6_TEMPLATE_LITERAL_SYNTAX) guards
https://bugs.webkit.org/show_bug.cgi?id=155417

Patch by Joseph Pecoraro <pecoraro@apple.com> on 2016-03-13
Reviewed by Yusuke Suzuki.

.:

* Source/cmake/OptionsWin.cmake:
* Source/cmake/WebKitFeatures.cmake:
* Source/cmake/tools/vsprops/FeatureDefines.props:
* Source/cmake/tools/vsprops/FeatureDefinesCairo.props:

Source/JavaScriptCore:

* Configurations/FeatureDefines.xcconfig:
* parser/Parser.cpp:
(JSC::Parser<LexerType>::parsePrimaryExpression): Deleted.
(JSC::Parser<LexerType>::parseMemberExpression): Deleted.

Source/WebCore:

* Configurations/FeatureDefines.xcconfig:

Source/WebKit/mac:

* Configurations/FeatureDefines.xcconfig:

Source/WebKit2:

* Configurations/FeatureDefines.xcconfig:

Source/WTF:

* wtf/FeatureDefines.h:

Tools:

* Scripts/webkitperl/FeatureList.pm:
* TestWebKitAPI/Configurations/FeatureDefines.xcconfig:

WebKitLibraries:

* win/tools/vsprops/FeatureDefines.props:
* win/tools/vsprops/FeatureDefinesCairo.props:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@198093 268f45cc-cd09-0410-ab3c-d52691b4dbfc