Drop unused "stl_container" class.

Author: isagalaev

docs/css-classes-reference.rst

@@ -519,7 +519,6 @@ Thrift ("thrift")
 * ``comment``:          comment
 * ``class``:            struct, enum, service or exception definition header
 * ``title``:            struct, enum, service or exception identifier
-* ``stl_container``:    instantiation of STL-like containers ("list<...>")
 
 HTTP ("http")
 -------------
@@ -614,7 +613,6 @@ C++ ("cpp", "c", "h", "c++", "h++")
 * ``string``:           string and character
 * ``comment``:          comment
 * ``preprocessor``:     preprocessor directive
-* ``stl_container``:    instantiation of STL containers ("vector<...>")
 
 Objective C ("objectivec", "m", "mm", "objc", "obj-c")
 ------------------------------------------------------

src/languages/cpp.js

@@ -66,7 +66,6 @@ function(hljs) {
         ]
       },
       {
-        className: 'stl_container',
         begin: '\\b(deque|list|queue|stack|vector|map|set|bitset|multiset|multimap|unordered_map|unordered_set|unordered_multiset|unordered_multimap|array)\\s*<', end: '>',
         keywords: CPP_KEYWORDS,
         contains: ['self']

src/languages/thrift.js

@@ -32,7 +32,6 @@ function(hljs) {
         ]
       },
       {
-        className: 'stl_container',
         begin: '\\b(set|list|map)\\s*<', end: '>',
         keywords: BUILT_IN_TYPES,
         contains: ['self']