score: Delete nest level from internal error state

This reverts commit 7d0bdcac1a.

cpukit/score/include/rtems/score/interr.h

@@ -158,13 +158,6 @@ typedef struct {
   bool                    is_internal;
   /** This is the error code. */
   Internal_errors_t       the_error;
-
-  /**
-   * @brief The internal error nest level.
-   *
-   * This helps to detect recursive calls to _Internal_error_Occurred().
-   */
-  uint32_t                nest_level;
 } Internal_errors_Information;
 
 /**

cpukit/score/src/interr.c

@@ -55,8 +55,6 @@ void _Internal_error_Occurred(
   _Internal_errors_What_happened.is_internal = is_internal;
   _Internal_errors_What_happened.the_error   = the_error;
 
-  ++_Internal_errors_What_happened.nest_level;
-
   _User_extensions_Fatal( the_source, is_internal, the_error );
 
   _System_state_Set( SYSTEM_STATE_FAILED );