Remove mbed interface deprecated API

Author: rajkan01

platform/mbed_interface.h

@@ -177,10 +177,6 @@ void mbed_error_vprintf(const char *format, va_list arg) MBED_PRINTF(1, 0);
  */
 void mbed_error_puts(const char *str);
 
-/** @deprecated   Renamed to mbed_error_vprintf to match functionality */
-MBED_DEPRECATED_SINCE("mbed-os-5.11",
-                      "Renamed to mbed_error_vprintf to match functionality.")
-void mbed_error_vfprintf(const char *format, va_list arg) MBED_PRINTF(1, 0);
 /** @}*/
 
 

platform/source/mbed_board.c

@@ -112,8 +112,3 @@ void mbed_error_puts(const char *str)
 #endif
     core_util_critical_section_exit();
 }
-
-void mbed_error_vfprintf(const char *format, va_list arg)
-{
-    mbed_error_vprintf(format, arg);
-}