sal: remove pointless checking for __cplusplus in public C++ headers

Change-Id: Ibbcdb4a3f46b7491396a1b1c7b4cdc1af05f30d3

include/osl/conditn.hxx

@@ -20,8 +20,6 @@
 #ifndef INCLUDED_OSL_CONDITN_HXX
 #define INCLUDED_OSL_CONDITN_HXX
 
-#ifdef __cplusplus
-
 #include <osl/time.h>
 
 #include <osl/conditn.h>
@@ -122,7 +120,6 @@ namespace osl
 
 }
 
-#endif  /* __cplusplus */
 #endif // INCLUDED_OSL_CONDITN_HXX
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

include/osl/mutex.hxx

@@ -20,8 +20,6 @@
 #ifndef INCLUDED_OSL_MUTEX_HXX
 #define INCLUDED_OSL_MUTEX_HXX
 
-#ifdef __cplusplus
-
 #include <osl/mutex.h>
 
 
@@ -240,7 +238,6 @@ namespace osl
     typedef ResettableGuard< Mutex > ResettableMutexGuard;
 }
 
-#endif  /* __cplusplus */
 #endif // INCLUDED_OSL_MUTEX_HXX
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

include/rtl/strbuf.hxx

@@ -33,8 +33,6 @@
 #include <rtl/stringconcat.hxx>
 #endif
 
-#ifdef __cplusplus
-
 // The unittest uses slightly different code to help check that the proper
 // calls are made. The class is put into a different namespace to make
 // sure the compiler generates a different (if generating also non-inline)
@@ -974,7 +972,6 @@ typedef rtlunittest::OStringBuffer OStringBuffer;
 using ::rtl::OStringBuffer;
 #endif
 
-#endif  /* __cplusplus */
 #endif // INCLUDED_RTL_STRBUF_HXX