Some cppcheck cleaning

Change-Id: I1dc8415569f7133d57c495e47f038e98d50d64d7

sal/osl/unx/file_misc.cxx

@@ -731,9 +731,7 @@ oslFileError SAL_CALL osl_removeFile( rtl_uString* ustrFileURL )
 
 static oslFileError oslDoMoveFile( const sal_Char* pszPath, const sal_Char* pszDestPath)
 {
-    oslFileError tErr=osl_File_E_invalidError;
-
-    tErr = osl_psz_moveFile(pszPath,pszDestPath);
+    oslFileError tErr = osl_psz_moveFile(pszPath,pszDestPath);
     if ( tErr == osl_File_E_None )
     {
         return tErr;

sal/rtl/source/alloc_cache.cxx

@@ -937,11 +937,9 @@ rtl_cache_deactivate (
     rtl_cache_type * cache
 )
 {
-    int active = 1;
-
     /* remove from cache list */
     RTL_MEMORY_LOCK_ACQUIRE(&(g_cache_list.m_lock));
-    active = QUEUE_STARTED_NAMED(cache, cache_) == 0;
+    int active = QUEUE_STARTED_NAMED(cache, cache_) == 0;
     QUEUE_REMOVE_NAMED(cache, cache_);
     RTL_MEMORY_LOCK_RELEASE(&(g_cache_list.m_lock));