[MIPS GlobalISel] minor update to MIR tests added in r329819

Remove 'registers' section, as suggested (D. Sanders) at code review

https://reviews.llvm.org/D44304

llvm-svn: 329888

llvm/test/CodeGen/Mips/GlobalISel/instruction-select/add.mir

@@ -11,10 +11,6 @@ alignment:       2
 legalized:       true
 regBankSelected: true
 tracksRegLiveness: true
-registers:
-  - { id: 0, class: gprb }
-  - { id: 1, class: gprb }
-  - { id: 2, class: gprb }
 body:             |
   bb.0.entry:
     liveins: $a0, $a1

llvm/test/CodeGen/Mips/GlobalISel/legalizer/add.mir

@@ -10,10 +10,6 @@ name:            add_i32
 alignment:       2
 legalized:       true
 tracksRegLiveness: true
-registers:
-  - { id: 0, class: _ }
-  - { id: 1, class: _ }
-  - { id: 2, class: _ }
 body:             |
   bb.0.entry:
     liveins: $a0, $a1

llvm/test/CodeGen/Mips/GlobalISel/regbankselect/add.mir

@@ -10,10 +10,6 @@ name:            add_i32
 alignment:       2
 legalized:       true
 tracksRegLiveness: true
-registers:
-  - { id: 0, class: _ }
-  - { id: 1, class: _ }
-  - { id: 2, class: _ }
 body:             |
   bb.0.entry:
     liveins: $a0, $a1