mimxrt/boards: Set __heap_size__ to 0 in MIMXRT1011.ld.
Do not use the traditional C heap in order to save memory, because the
traditional C heap is unused in MicroPython.
@@ -3,6 +3,9 @@ __stack_size__ = 0x6000;
_estack = __StackTop;
_sstack = __StackLimit;
+/* Do not use the traditional C heap. */
+__heap_size__ = 0;
+
/* Use second OCRAM bank for GC heap. */
_gc_heap_start = ORIGIN(m_data2);
_gc_heap_end = ORIGIN(m_data2) + LENGTH(m_data2);
