remove autocorrect stub from unit test (should no longer be needed?)

indra/integration_tests/llui_libtest/llui_libtest.cpp

@@ -31,7 +31,6 @@
 #include "llwidgetreg.h"
 
 // linden library includes
-#include "llautocorrect.h"
 #include "llcontrol.h"		// LLControlGroup
 #include "lldir.h"
 #include "lldiriterator.h"
@@ -108,16 +107,6 @@ public:
 };
 TestImageProvider gTestImageProvider;
 
-// Mock Autocorrect
-AutoCorrect* AutoCorrect::getInstance()
-{
-	return NULL;
-}
-std::string AutoCorrect::replaceWord(std::string currentWord)
-{
-	return currentWord;
-}
-
 static std::string get_xui_dir()
 {
 	std::string delim = gDirUtilp->getDirDelimiter();