Update test snapshots to reflect current IR output

Author: jserv

src/riscv-codegen.c

@@ -439,7 +439,6 @@ void emit_ph2_ir(ph2_ir_t *ph2_ir)
 void code_generate(void)
 {
     elf_data_start = elf_code_start + elf_offset;
-    func_t *func;
 
     /* start: save original sp in s0; allocate global stack; run init */
     emit(__addi(__s0, __sp, 0));