Bug 1255763 - Remove OSTYPE define in intl/locale/unix/moz.build. r=gps

OSTYPE was removed in bug 752406.

intl/locale/unix/moz.build

@@ -39,7 +39,5 @@ LOCAL_INCLUDES += [
 if CONFIG['OS_ARCH'] == 'Linux':
     DEFINES['_XOPEN_SOURCE'] = 500
 
-DEFINES['OSTYPE'] = '"%s"' % CONFIG['OS_CONFIG']
-
 if CONFIG['GNU_CXX']:
     CXXFLAGS += ['-Wshadow']