Remove support for undocumented SOLAR_USER_RTL_TEXTENCODING env var

...introduced in 2001 with a Sun-internal bug ID as
3b1d10ac and
54007bb9 "#84715# osl_getThreadTextEncoding
first defaults to contents of environment variable SOLAR_USER_RTL_TEXTENCODING."

Change-Id: I991b4777c27a24419bf066cf41b3c4545d0fa681

sal/osl/unx/thread.c

@@ -951,19 +951,11 @@ sal_Bool SAL_CALL osl_setThreadKeyData(oslThreadKey Key, void *pData)
 /*****************************************************************************/
 static void osl_thread_textencoding_init_Impl (void)
 {
-    rtl_TextEncoding defaultEncoding;
-    const char *     pszEncoding;
-
     /* create thread specific data key */
     pthread_key_create (&(g_thread.m_textencoding.m_key), NULL);
 
     /* determine default text encoding */
-    pszEncoding = getenv ("SOLAR_USER_RTL_TEXTENCODING");
-    if (pszEncoding)
-        defaultEncoding = atoi(pszEncoding);
-    else
-        defaultEncoding = osl_getTextEncodingFromLocale(NULL);
-
+    rtl_TextEncoding defaultEncoding = osl_getTextEncodingFromLocale(NULL);
     OSL_ASSERT(defaultEncoding != RTL_TEXTENCODING_DONTKNOW);
 
     /*

sal/osl/w32/thread.c

@@ -576,16 +576,9 @@ rtl_TextEncoding SAL_CALL osl_getThreadTextEncoding(void)
     _encoding = LOWORD(dwEncoding);
     gotACP = HIWORD(dwEncoding);
 
-
     if ( !gotACP )
     {
-        char    *pszEncoding;
-
-        if ( NULL != (pszEncoding = getenv( "SOLAR_USER_RTL_TEXTENCODING" )) )
-            _encoding = (rtl_TextEncoding)atoi(pszEncoding);
-        else
-            _encoding = rtl_getTextEncodingFromWindowsCodePage( GetACP() );
-
+        _encoding = rtl_getTextEncodingFromWindowsCodePage( GetACP() );
         TlsSetValue( g_dwTLSTextEncodingIndex, (LPVOID)(DWORD_PTR)MAKELONG( _encoding, TRUE ) );
     }