Remove redundant check of key for text input events

Input events with `IInput::FLAG_TEXT` never have a key, so this additional check for modifier keys is redundant.

src/game/client/lineinput.cpp

@@ -196,7 +196,7 @@ bool CLineInput::ProcessInput(const IInput::CEvent &Event)
 	const size_t SelectionLength = GetSelectionLength();
 	bool KeyHandled = false;
 
-	if((Event.m_Flags & IInput::FLAG_TEXT) && !(KEY_LCTRL <= Event.m_Key && Event.m_Key <= KEY_RGUI))
+	if(Event.m_Flags & IInput::FLAG_TEXT)
 	{
 		SetRange(Event.m_aText, m_SelectionStart, m_SelectionEnd);
 		KeyHandled = true;