Remove unused mips/mips64 code from the linker.

Test: treehugger
Change-Id: I42f1e4c492ac644cf78e7c1196ba9b3518f9c8f8
diff --git a/linker/linker.cpp b/linker/linker.cpp
index 0e68259..03b08b6 100644
--- a/linker/linker.cpp
+++ b/linker/linker.cpp
@@ -2949,25 +2949,15 @@
         break;
 
       case DT_PLTGOT:
-#if defined(__mips__)
-        // Used by mips and mips64.
-        plt_got_ = reinterpret_cast<ElfW(Addr)**>(load_bias + d->d_un.d_ptr);
-#endif
-        // Ignore for other platforms... (because RTLD_LAZY is not supported)
+        // Ignored (because RTLD_LAZY is not supported).
         break;
 
       case DT_DEBUG:
         // Set the DT_DEBUG entry to the address of _r_debug for GDB
         // if the dynamic table is writable
-// FIXME: not working currently for N64
-// The flags for the LOAD and DYNAMIC program headers do not agree.
-// The LOAD section containing the dynamic table has been mapped as
-// read-only, but the DYNAMIC header claims it is writable.
-#if !(defined(__mips__) && defined(__LP64__))
         if ((dynamic_flags & PF_W) != 0) {
           d->d_un.d_val = reinterpret_cast<uintptr_t>(&_r_debug);
         }
-#endif
         break;
 #if defined(USE_RELA)
       case DT_RELA:
@@ -3162,41 +3152,7 @@
                   get_realpath(), reinterpret_cast<void*>(d->d_un.d_val));
         }
         break;
-#if defined(__mips__)
-      case DT_MIPS_RLD_MAP:
-        // Set the DT_MIPS_RLD_MAP entry to the address of _r_debug for GDB.
-        {
-          r_debug** dp = reinterpret_cast<r_debug**>(load_bias + d->d_un.d_ptr);
-          *dp = &_r_debug;
-        }
-        break;
-      case DT_MIPS_RLD_MAP_REL:
-        // Set the DT_MIPS_RLD_MAP_REL entry to the address of _r_debug for GDB.
-        {
-          r_debug** dp = reinterpret_cast<r_debug**>(
-              reinterpret_cast<ElfW(Addr)>(d) + d->d_un.d_val);
-          *dp = &_r_debug;
-        }
-        break;
 
-      case DT_MIPS_RLD_VERSION:
-      case DT_MIPS_FLAGS:
-      case DT_MIPS_BASE_ADDRESS:
-      case DT_MIPS_UNREFEXTNO:
-        break;
-
-      case DT_MIPS_SYMTABNO:
-        mips_symtabno_ = d->d_un.d_val;
-        break;
-
-      case DT_MIPS_LOCAL_GOTNO:
-        mips_local_gotno_ = d->d_un.d_val;
-        break;
-
-      case DT_MIPS_GOTSYM:
-        mips_gotsym_ = d->d_un.d_val;
-        break;
-#endif
       // Ignored: "Its use has been superseded by the DF_BIND_NOW flag"
       case DT_BIND_NOW:
         break;
@@ -3254,12 +3210,6 @@
     }
   }
 
-#if defined(__mips__) && !defined(__LP64__)
-  if (!mips_check_and_adjust_fp_modes()) {
-    return false;
-  }
-#endif
-
   DEBUG("si->base = %p, si->strtab = %p, si->symtab = %p",
         reinterpret_cast<void*>(base), strtab_, symtab_);