[RISCV] Remove duplicate Smrnmi CSR test cases. NFC

ed6ddff added tests that already
existed.

Author: topperc

llvm/test/MC/RISCV/machine-csr-names.s

@@ -1913,66 +1913,6 @@ csrrs t1, mhpmcounter31, zero
 csrrs t2, 0xB1F, zero
 
 
-######################################
-# Machine Counter Setup
-######################################
-# mnscratch
-# name
-# CHECK-INST: csrrs t1, mnscratch, zero
-# CHECK-ENC: encoding: [0x73,0x23,0x00,0x74]
-# CHECK-INST-ALIAS: csrr t1, mnscratch
-# uimm12
-# CHECK-INST: csrrs t2, mnscratch, zero
-# CHECK-ENC: encoding: [0xf3,0x23,0x00,0x74]
-# CHECK-INST-ALIAS: csrr t2, mnscratch
-# name
-csrrs t1, mnscratch, zero
-# uimm12
-csrrs t2, 0x740, zero
-
-# mnepc
-# name
-# CHECK-INST: csrrs t1, mnepc, zero
-# CHECK-ENC: encoding: [0x73,0x23,0x10,0x74]
-# CHECK-INST-ALIAS: csrr t1, mnepc
-# uimm12
-# CHECK-INST: csrrs t2, mnepc, zero
-# CHECK-ENC: encoding: [0xf3,0x23,0x10,0x74]
-# CHECK-INST-ALIAS: csrr t2, mnepc
-# name
-csrrs t1, mnepc, zero
-# uimm12
-csrrs t2, 0x741, zero
-
-# mncause
-# name
-# CHECK-INST: csrrs t1, mncause, zero
-# CHECK-ENC: encoding: [0x73,0x23,0x20,0x74]
-# CHECK-INST-ALIAS: csrr t1, mncause
-# uimm12
-# CHECK-INST: csrrs t2, mncause, zero
-# CHECK-ENC: encoding: [0xf3,0x23,0x20,0x74]
-# CHECK-INST-ALIAS: csrr t2, mncause
-# name
-csrrs t1, mncause, zero
-# uimm12
-csrrs t2, 0x742, zero
-
-# mnstatus
-# name
-# CHECK-INST: csrrs t1, mnstatus, zero
-# CHECK-ENC: encoding: [0x73,0x23,0x40,0x74]
-# CHECK-INST-ALIAS: csrr t1, mnstatus
-# uimm12
-# CHECK-INST: csrrs t2, mnstatus, zero
-# CHECK-ENC: encoding: [0xf3,0x23,0x40,0x74]
-# CHECK-INST-ALIAS: csrr t2, mnstatus
-# name
-csrrs t1, mnstatus, zero
-# uimm12
-csrrs t2, 0x744, zero
-
-
 ######################################
 # Machine Counter Setup
 ######################################