removed misa override

Author: Saad Khalid

dv/cosim/spike_cosim.cc

@@ -708,18 +708,6 @@ void SpikeCosim::fixup_csr(int csr_num, uint32_t csr_val) {
       processor->set_csr(csr_num, new_val);
 #else
       processor->put_csr(csr_num, new_val);
-#endif
-      break;
-    }
-    case CSR_MISA: {
-      // For Ibex, misa.C is hardwired
-
-      uint32_t misa_or_mask = 0x4;
-      reg_t new_val = csr_val | misa_or_mask;
-#ifdef OLD_SPIKE
-      processor->set_csr(csr_num, new_val);
-#else
-      processor->put_csr(csr_num, new_val);
 #endif
       break;
     }