removing bullseye from tune length display

Description

when measure length in tune length mode of PCB Editor, "bulls eye" overlaps the number

the haircross shows where we are, moreover measured segments are highlited, so please remove the extra pointer.......which is ugly and totally unneccessary:)

Steps to reproduce

push hotkey "7"

KiCad Version

Application: KiCad PCB Editor x64 on x64

Version: 9.0.6, release build

Libraries: wxWidgets 3.2.8 FreeType 2.13.3 HarfBuzz 10.2.0 FontConfig 2.15.0 libcurl/8.13.0-DEV Schannel zlib/1.3.1

Platform: Windows 11 (build 26200), 64-bit edition, 64 bit, Little endian, wxMSW OpenGL: ATI Technologies Inc., AMD Radeon (TM) Graphics, 4.6.0 Compatibility Profile Context 23.19.14.08.240820

Build Info: Date: Oct 30 2025 19:36:12 wxWidgets: 3.2.8 (wchar_t,wx containers) Boost: 1.88.0 OCC: 7.9.1 Curl: 8.13.0-DEV ngspice: 45.2 Compiler: Visual C++ 1944 without C++ ABI KICAD_IPC_API=ON

Locale: Lang: en_GB Enc: UTF-8 Num: 1,234.5 Encoded кΩ丈: D0BACEA9E4B888 (sys), D0BACEA9E4B888 (utf8)