objtool: Remove unneeded semicolon

Remove unnecessary semicolons reported by Coccinelle/coccicheck and the
semantic patch at scripts/coccinelle/misc/semicolon.cocci.

Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Link: https://patch.msgid.link/20251020020916.1070369-1-nichen@iscas.ac.cn
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>

tools/objtool/elf.c

@@ -451,7 +451,7 @@ static const char *demangle_name(struct symbol *sym)
 			str[i + 1] = '\0';
 			break;
 		}
-	};
+	}
 
 	return str;
 }