Fix ASM that interfered with the GCC linker script and made the linker try to zero the entire RAM space (#75)

Author: Jamie Smith

targets/TARGET_Maxim/TARGET_MAX32620C/device/TOOLCHAIN_GCC_ARM/startup_max32620.S

@@ -34,36 +34,6 @@
     .syntax unified
     .arch armv7-m
 
-    .section .stack
-    .align 3
-#ifdef __STACK_SIZE
-    .equ    Stack_Size, __STACK_SIZE
-#else
-    .equ    Stack_Size, 0x00001000
-#endif
-    .globl    __StackTop
-    .globl    __StackLimit
-__StackLimit:
-    .space    Stack_Size
-    .size   __StackLimit, . - __StackLimit
-__StackTop:
-    .size   __StackTop, . - __StackTop
-
-    .section .heap
-    .align 3
-#ifdef __HEAP_SIZE
-    .equ    Heap_Size, __HEAP_SIZE
-#else
-    .equ    Heap_Size, 0x00004000
-#endif
-    .globl  __HeapBase
-    .globl  __HeapLimit
-__HeapBase:
-    .space  Heap_Size
-    .size   __HeapBase, . - __HeapBase
-__HeapLimit:
-    .size __HeapLimit, . - __HeapLimit
-
     .section .isr_vector
     .align 2
     .globl  __isr_vector