Revert "fix: Potential out of bounds access of flightmode name on main screen (#1337)"

This reverts commit 1b6f827b2c.

radio/src/gui/colorlcd/view_main_decoration.cpp

@@ -328,8 +328,8 @@ void ViewMainDecoration::createFlightMode()
   };
 
   std::function<std::string()> getFM = []() -> std::string {
-      return stringFromNtString(g_model.flightModeData[mixerCurrentFlightMode].name);
-};
+    return g_model.flightModeData[mixerCurrentFlightMode].name;
+  };
 
   flightMode = new DynamicText(this, r, getFM, CENTERED | COLOR_THEME_SECONDARY1);
 }

radio/src/strhelpers.h

@@ -25,8 +25,6 @@
 #include "definitions.h"
 #include "opentx_types.h"
 
-#include <string>
-
 #define SHOW_TIME  0x1
 #define SHOW_TIMER 0x0
 #define SHOW_TIMER_UPPER_CASE   0x2
@@ -92,8 +90,4 @@ char *getTimerString(int32_t tme, TimerOptions timerOptions = {.options = 0});
 void splitTimer(char *s0, char *s1, char *s2, char *s3, int tme,
                 bool bLowercase = true);
 
-template<size_t N>
-constexpr std::string stringFromNtString(const char (&a)[N]) {
-    return std::string(a, strnlen(a, N));        
-}    
 #endif  // _STRHELPERS_H_