[Erlang] Remove special scoping of erlang atoms

This commit removes the `variable-erlang` context, which was used to
scope all `erlang` tokens as `variable.namespace`.

As a result the `erlang` token is scoped as ordinary atom if not
followed by an accessor.

For the reason of change, please refer to:

  sublimehq#1878 (comment)

Erlang/Erlang.sublime-syntax

@@ -164,7 +164,6 @@ contexts:
     - include: string
     - include: operator-unary
     - include: variable-anonymous
-    - include: variable-erlang
     - include: atom
 
   common:
@@ -1444,10 +1443,6 @@ contexts:
     - match: \.{3}
       scope: variable.language.any.erlang
 
-  variable-erlang:
-    - match: erlang{{ident_break}}
-      scope: support.namespace.erlang
-
   variable-other:
     - match: '{{variable}}'
       scope: variable.other.erlang

Erlang/syntax_test_erlang.erl

@@ -4397,7 +4397,7 @@ function_call_tests() ->
 % erlang is a special autoimported namespace
 
     erlang
-%   ^^^^^^ support.namespace.erlang
+%   ^^^^^^ meta.atom.erlang constant.other.symbol.erlang - meta.path - support.namespace
 
     erlang:
 %  ^ - meta.path