[LyX/master] Remove unneeded typedef

[Georg Baum]

commit 49af9db6237f3d7c64c41cb3a4fac81be51e602a
Author: Georg Baum <b...@lyx.org>
Date:   Wed Dec 3 21:08:13 2014 +0100

    Remove unneeded typedef
    
    docstring is already defined in strfwd.h (which is included from 
docstring.h).
    There are only two possible cases:
    Either the typedef in docstring.h defines an identical type (then it is not
    needed), or it defines a different type (then it generates a compilation 
error)
    => it is not needed.

diff --git a/src/support/docstring.h b/src/support/docstring.h
index 5eea011..096bc00 100644
--- a/src/support/docstring.h
+++ b/src/support/docstring.h
@@ -19,13 +19,6 @@
 
 namespace lyx {
 
-/**
- * String type for storing the main text in UCS4 encoding.
- * Use std::string only in cases 7-bit ASCII is to be manipulated
- * within the variable.
- */
-typedef std::basic_string<char_type> docstring;
-
 /// Creates a docstring from a C string of ASCII characters
 docstring const from_ascii(char const *);
 
diff --git a/src/support/strfwd.h b/src/support/strfwd.h
index e40ec1c..10411cd 100644
--- a/src/support/strfwd.h
+++ b/src/support/strfwd.h
@@ -68,7 +68,11 @@ typedef basic_ostringstream<char, char_traits<char>, 
allocator<char> > ostringst
 
 namespace lyx {
 
-/// String type for storing the main text in UCS4 encoding
+/**
+ * String type for storing the main text in UCS4 encoding.
+ * Use std::string only in cases 7-bit ASCII is to be manipulated
+ * within the variable.
+ */
 typedef std::basic_string<char_type, std::char_traits<char_type>,
        std::allocator<char_type> > docstring;