Fix ASM that interfered with the GCC linker script and made the linke…

…r try to zero the entire RAM space (ARMmbed#75)

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