gdb: Remove language_data struct

The language_data type, from which language_defn inherits, is now
empty, and this commit removes it.

Each language is updated to no longer create and use a language_data
struct.

There should be no user visible changes after this commit.

gdb/ChangeLog:

	* ada-lang.c (ada_language_data): Delete.
	(ada_language): Remove references to ada_language_data.
	* c-lang.c (c_language_data): Delete.
	(c_language): Remove references to c_language_data.
	(cplus_language_data): Delete.
	(cplus_language): Remove references to cplus_language_data.
	(asm_language_data): Delete.
	(asm_language): Remove references to asm_language_data.
	(minimal_language_data): Delete.
	(minimal_language): Remove references to minimal_language_data.
	* d-lang.c (d_language_data): Delete.
	(d_language): Remove references to d_language_data.
	* f-lang.c (f_language_data): Delete.
	(f_language): Remove references to f_language_data.
	* go-lang.c (go_language_data): Delete.
	(go_language): Remove references to go_language_data.
	* language.c (unknown_language_data): Delete.
	(unknown_language): Remove references to unknown_language_data.
	(auto_language_data): Delete.
	(auto_language): Remove references to auto_language_data.
	* language.h (language_data): Delete struct.
	(language_defn): No longer inherit from language_data.
	* m2-lang.c (m2_language_data): Delete.
	(m2_language): Remove references to m2_language_data.
	* objc-lang.c (objc_language_data): Delete.
	(objc_language): Remove references to objc_language_data.
	* opencl-lang.c (opencl_language_data): Delete.
	(opencl_language): Remove references to opencl_language_data.
	* p-lang.c (pascal_language_data): Delete.
	(pascal_language): Remove references to pascal_language_data.
	* rust-lang.c (rust_language_data): Delete.
	(rust_language): Remove references to rust_language_data.

1 files changed, 3 insertions, 22 deletions

diff --git a/gdb/language.h b/gdb/language.h
index 2d13cfa..3ee6476 100644
--- a/gdb/language.h
+++ b/gdb/language.h
@@ -152,31 +152,12 @@ struct language_pass_by_ref_info
 /* Splitting strings into words.  */
 extern const char *default_word_break_characters (void);
 
-/* Structure tying together assorted information about a language.
-
-   As we move over from the old structure based languages to a class
-   hierarchy of languages this structure will continue to contain a
-   mixture of both data and function pointers.
-
-   Once the class hierarchy of languages in place the first task is to
-   remove the function pointers from this structure and convert them into
-   member functions on the different language classes.
-
-   The current plan it to keep the constant data that describes a language
-   in this structure, and have each language pass in an instance of this
-   structure at construction time.  */
-
-struct language_data
-  {
-  };
-
 /* Base class from which all other language classes derive.  */
 
-struct language_defn : language_data
+struct language_defn
 {
-  language_defn (enum language lang, const language_data &init_data)
-    : language_data (init_data),
-      la_language (lang)
+  language_defn (enum language lang)
+    : la_language (lang)
   {
     /* We should only ever create one instance of each language.  */
     gdb_assert (languages[lang] == nullptr);