Fix warnings when building Blender with mold linker on linux.

Remove the three problematic entries:
- `aligned_free` is not a 'real' function and does not need to be
  handled here. There is no symetry with the `aligned_malloc` symbol
  here.
- `__end` and `_bss_start` seem to have been mis-typed from the
  beginning (actual symbols seem to be `_end` and `__bss_start`).
  Regardless, neither `gold` nor `mold` seem to take these directives
  from the LD version script into account (result is the same for them
  when removed for the `.map` file), so removing them.

Pull Request: https://projects.blender.org/blender/blender/pulls/127761

source/creator/symbols_unix.map

@@ -5,8 +5,6 @@
 {
 global:
   /* Essential symbols for the program to start and exit. */
-  _bss_start;
-  __end;
   _fini;
   _init;
   /* Needed for Python modules to work. */
@@ -24,7 +22,6 @@ global:
   __Zdl*;
   __Zda*;
   aligned_alloc;
-  aligned_free;
   calloc*;
   free;
   mallinfo;