[Darwin, PPC, committed] Remove dead code.

[Iain Sandoe]

TARGET_LINK_STACK is unused on Darwin, and only relevant to a processor on
which the port was never released.

tested on powerpc-darwin9, 
applied to mainline
thanks
Iain

2019-07-05  Iain Sandoe  <i...@sandoe.co.uk>

        * config/rs6000/rs6000-logue.c: Remove unused code.


diff --git a/gcc/config/rs6000/rs6000-logue.c b/gcc/config/rs6000/rs6000-logue.c
index 3fe6230..8454f96 100644
--- a/gcc/config/rs6000/rs6000-logue.c
+++ b/gcc/config/rs6000/rs6000-logue.c
@@ -5100,24 +5100,11 @@ macho_branch_islands (void)
 #endif /* DBX_DEBUGGING_INFO || XCOFF_DEBUGGING_INFO */
       if (flag_pic)
        {
-         if (TARGET_LINK_STACK)
-           {
-             char name[32];
-             get_ppc476_thunk_name (name);
-             strcat (tmp_buf, ":\n\tmflr r0\n\tbl ");
-             strcat (tmp_buf, name);
-             strcat (tmp_buf, "\n");
-             strcat (tmp_buf, label);
-             strcat (tmp_buf, "_pic:\n\tmflr r11\n");
-           }
-         else
-           {
-             strcat (tmp_buf, ":\n\tmflr r0\n\tbcl 20,31,");
-             strcat (tmp_buf, label);
-             strcat (tmp_buf, "_pic\n");
-             strcat (tmp_buf, label);
-             strcat (tmp_buf, "_pic:\n\tmflr r11\n");
-           }
+         strcat (tmp_buf, ":\n\tmflr r0\n\tbcl 20,31,");
+         strcat (tmp_buf, label);
+         strcat (tmp_buf, "_pic\n");
+         strcat (tmp_buf, label);
+         strcat (tmp_buf, "_pic:\n\tmflr r11\n");
 
          strcat (tmp_buf, "\taddis r11,r11,ha16(");
          strcat (tmp_buf, name_buf);