Remove unneccessary checks

disasm.go

@@ -1,10 +1,6 @@
 // Package disasm provides a Z80 disassembler implementation
 package disasm
 
-import (
-	"fmt"
-)
-
 // Instruction represents a decoded Z80 instruction
 type Instruction struct {
 	Mnemonic string // Human-readable instruction mnemonic
@@ -23,10 +19,6 @@ func New() *Disassembler {
 // Decode decodes a single Z80 instruction from a byte slice
 // It returns the decoded instruction and any error encountered
 func (d *Disassembler) Decode(data []byte) (*Instruction, error) {
-	if len(data) == 0 {
-		return nil, fmt.Errorf("no data to decode")
-	}
-
 	// Get the first opcode byte
 	opcode := data[0]