diff --git a/checkother.cpp b/checkother.cpp
index 1d417b06e..2d36313f7 100644
--- a/checkother.cpp
+++ b/checkother.cpp
@@ -69,89 +69,6 @@ void CheckOther::WarningOldStylePointerCast()
 
 
 
-//---------------------------------------------------------------------------
-// Use standard function "isdigit" instead
-//---------------------------------------------------------------------------
-
-void CheckOther::WarningIsDigit()
-{
-    for (const TOKEN *tok = _tokenizer->tokens(); tok; tok = tok->next())
-    {
-        bool err = false;
-        err |= TOKEN::Match(tok, "%var% >= '0' && %var% <= '9'");
-        err |= TOKEN::Match(tok, "* %var% >= '0' && * %var% <= '9'");
-        err |= TOKEN::Match(tok, "( %var% >= '0' ) && ( %var% <= '9' )");
-        err |= TOKEN::Match(tok, "( * %var% >= '0' ) && ( * %var% <= '9' )");
-        if (err)
-        {
-            std::ostringstream ostr;
-            ostr << _tokenizer->fileLine(tok) << ": The condition can be simplified; use 'isdigit'";
-            _errorLogger->reportErr(ostr.str());
-        }
-    }
-}
-//---------------------------------------------------------------------------
-
-
-
-//---------------------------------------------------------------------------
-// Use standard function "isalpha" instead
-//---------------------------------------------------------------------------
-
-void CheckOther::WarningIsAlpha()
-{
-    for (const TOKEN *tok = _tokenizer->tokens(); tok; tok = tok->next())
-    {
-        if ( tok->str() != "(" )
-            continue;
-
-        bool err = false;
-
-        err |= TOKEN::Match(tok, "( %var% >= 'A' && %var% <= 'Z' )");
-        err |= TOKEN::Match(tok, "( * %var% >= 'A' && * %var% <= 'Z' )");
-        err |= TOKEN::Match(tok, "( ( %var% >= 'A' ) && ( %var% <= 'Z' ) )");
-        err |= TOKEN::Match(tok, "( ( * %var% >= 'A' ) && ( * %var% <= 'Z' ) )");
-        if (err)
-        {
-            std::ostringstream ostr;
-            ostr << _tokenizer->fileLine(tok) << ": The condition can be simplified; use 'isupper'";
-            _errorLogger->reportErr(ostr.str());
-            continue;
-        }
-
-        err = false;
-        err |= TOKEN::Match(tok, "( %var% >= 'a' && %var% <= 'z' )");
-        err |= TOKEN::Match(tok, "( * %var% >= 'a' && * %var% <= 'z' )");
-        err |= TOKEN::Match(tok, "( ( %var% >= 'a' ) && ( %var% <= 'z' ) )");
-        err |= TOKEN::Match(tok, "( ( * %var% >= 'a' ) && ( * %var% <= 'z' ) )");
-        if (err)
-        {
-            std::ostringstream ostr;
-            ostr << _tokenizer->fileLine(tok) << ": The condition can be simplified; use 'islower'";
-            _errorLogger->reportErr(ostr.str());
-            continue;
-        }
-
-        err = false;
-        err |= TOKEN::Match(tok, "( %var% >= 'A' && %var% <= 'Z' ) || ( %var% >= 'a' && %var% <= 'z' )");
-        err |= TOKEN::Match(tok, "( %var% >= 'a' && %var% <= 'z' ) || ( %var% >= 'A' && %var% <= 'Z' )");
-        err |= TOKEN::Match(tok, "( * %var% >= 'A' && * %var% <= 'Z' ) || ( * %var% >= 'a' && * %var% <= 'z' )");
-        err |= TOKEN::Match(tok, "( * %var% >= 'a' && * %var% <= 'z' ) || ( * %var% >= 'A' && * %var% <= 'Z' )");
-        err |= TOKEN::Match(tok, "( ( %var% >= 'A' ) && ( %var% <= 'Z' ) ) || ( ( %var% >= 'a' ) && ( %var% <= 'z' ) )");
-        err |= TOKEN::Match(tok, "( ( %var% >= 'a' ) && ( %var% <= 'z' ) ) || ( ( %var% >= 'A' ) && ( %var% <= 'Z' ) )");
-        err |= TOKEN::Match(tok, "( ( * %var% >= 'A' ) && ( * %var% <= 'Z' ) ) || ( ( * var >= 'a' ) && ( * %var% <= 'z' ) )");
-        err |= TOKEN::Match(tok, "( ( * %var% >= 'a' ) && ( * %var% <= 'z' ) ) || ( ( * var >= 'A' ) && ( * %var% <= 'Z' ) )");
-        if (err)
-        {
-            std::ostringstream ostr;
-            ostr << _tokenizer->fileLine(tok) << ": The condition can be simplified; use 'isalpha'";
-            _errorLogger->reportErr(ostr.str());
-        }
-    }
-}
-//---------------------------------------------------------------------------
-
-
 //---------------------------------------------------------------------------
 // Redundant code..
 //---------------------------------------------------------------------------
diff --git a/checkother.h b/checkother.h
index a84cd424c..c7f8ec025 100644
--- a/checkother.h
+++ b/checkother.h
@@ -35,12 +35,6 @@ public:
     // Casting
     void WarningOldStylePointerCast();
 
-    // Use standard functions instead
-    void WarningIsDigit();
-
-    // Use standard functions instead
-    void WarningIsAlpha();
-
     // Redundant code
     void WarningRedundantCode();
 
diff --git a/cppcheck.cpp b/cppcheck.cpp
index d520fbab3..e29b065c3 100644
--- a/cppcheck.cpp
+++ b/cppcheck.cpp
@@ -302,10 +302,6 @@ void CppCheck::checkFile(const std::string &code, const char FileName[])
         if (ext && strcmp(ext,".cpp")==0)
             checkOther.WarningOldStylePointerCast();
 
-        // Use standard functions instead
-        checkOther.WarningIsDigit();
-        checkOther.WarningIsAlpha();
-
         checkClass.CheckOperatorEq1();
 
         // if (a) delete a;