Revert "MIPS: add .module mipsREV to all output asm file"

This reverts commit d904008df2.

".module MIPSRev" has higher priority than -march=octeon or like.
It makes assembler cannot recognize the extension instructions
of octeon (See pr62030-octeon.c).

gcc/config/mips/mips.c

@@ -9841,44 +9841,6 @@ mips_mdebug_abi_name (void)
     }
 }
 
-static const char *
-mips_module_isa_name ()
-{
-  switch (mips_isa)
-    {
-    case MIPS_ISA_MIPS1:
-      return "mips1";
-    case MIPS_ISA_MIPS2:
-      return "mips2";
-    case MIPS_ISA_MIPS3:
-      return "mips3";
-    case MIPS_ISA_MIPS4:
-      return "mips4";
-    case MIPS_ISA_MIPS32:
-      return "mips32";
-    case MIPS_ISA_MIPS32R2:
-      return "mips32r2";
-    case MIPS_ISA_MIPS32R3:
-      return "mips32r3";
-    case MIPS_ISA_MIPS32R5:
-      return "mips32r5";
-    case MIPS_ISA_MIPS32R6:
-      return "mips32r6";
-    case MIPS_ISA_MIPS64:
-      return "mips64";
-    case MIPS_ISA_MIPS64R2:
-      return "mips64r2";
-    case MIPS_ISA_MIPS64R3:
-      return "mips64r3";
-    case MIPS_ISA_MIPS64R5:
-      return "mips64r5";
-    case MIPS_ISA_MIPS64R6:
-      return "mips64r6";
-    default:
-      gcc_unreachable ();
-    }
-}
-
 /* Implement TARGET_ASM_FILE_START.  */
 
 static void
@@ -9911,9 +9873,6 @@ mips_file_start (void)
 	     mips_nan == MIPS_IEEE_754_2008 ? "2008" : "legacy");
 
 #ifdef HAVE_AS_DOT_MODULE
-  fprintf (asm_out_file, "\t.module\t%s\n",
-	   mips_module_isa_name ());
-
   /* Record the FP ABI.  See below for comments.  */
   if (TARGET_NO_FLOAT)
 #ifdef HAVE_AS_GNU_ATTRIBUTE