openssl: remove unnecessary 'extern "C"' blocks from local headers

* ext/openssl/openssl_missing.h, ext/openssl/ossl.h: Remove
  unnecessary 'extern "C"' blocks. We don't use C++ and these headers
  are local to ext/openssl, so there is no need to enclose with it.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55161 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,9 @@
+Wed May 25 17:43:30 2016  Kazuki Yamaguchi  <k@rhe.jp>
+
+	* ext/openssl/openssl_missing.h, ext/openssl/ossl.h: Remove
+	  unnecessary 'extern "C"' blocks. We don't use C++ and these headers
+	  are local to ext/openssl, so there is no need to enclose with it.
+
 Wed May 25 17:42:58 2016  Kazuki Yamaguchi  <k@rhe.jp>
 
 	* ext/openssl/extconf.rb: Remove check of OPENSSL_FIPS macro. This is

ext/openssl/openssl_missing.h

@@ -10,10 +10,6 @@
 #if !defined(_OSSL_OPENSSL_MISSING_H_)
 #define _OSSL_OPENSSL_MISSING_H_
 
-#if defined(__cplusplus)
-extern "C" {
-#endif
-
 #ifndef TYPEDEF_D2I_OF
 typedef char *d2i_of_void();
 #endif
@@ -193,9 +189,4 @@ int PEM_def_callback(char *buf, int num, int w, void *key);
 int ASN1_put_eoc(unsigned char **pp);
 #endif
 
-#if defined(__cplusplus)
-}
-#endif
-
-
 #endif /* _OSSL_OPENSSL_MISSING_H_ */

ext/openssl/ossl.h

@@ -12,10 +12,6 @@
 
 #include RUBY_EXTCONF_H
 
-#if defined(__cplusplus)
-extern "C" {
-#endif
-
 #if 0
   mOSSL = rb_define_module("OpenSSL");
   mX509 = rb_define_module_under(mOSSL, "X509");
@@ -247,8 +243,4 @@ void ossl_debug(const char *, ...);
 
 void Init_openssl(void);
 
-#if defined(__cplusplus)
-}
-#endif
-
 #endif /* _OSSL_H_ */