Remove RawEndPoint.

[bzbarsky-apple]

This is unused in Matter. The only use case is ICMP, and Matter
doesn't do ICMP.

Problem

Dead (and buggy, which is why I was looking at it) code.

Change overview

Remove the code.

Testing

Unit tests still pass.

[github-actions]

Size increase report for "esp32-example-build" from eda07d5

File	Section	File	VM
chip-ipv6only-app.elf	.flash.text	172	172
chip-bridge-app.elf	.flash.rodata	-8	-8
chip-bridge-app.elf	.flash.text	-100	-100
chip-temperature-measurement-app.elf	.flash.rodata	-8	-8
chip-temperature-measurement-app.elf	.flash.text	-24	-24
chip-lock-app.elf	.flash.text	32	32
chip-lock-app.elf	.flash.rodata	-8	-8
chip-all-clusters-app.elf	.flash.rodata	-8	-8
chip-shell.elf	.flash.rodata	-8	-8
chip-shell.elf	.flash.text	-28	-28

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

Comparing ./master_artifact/chip-ipv6only-app.elf and ./pull_artifact/chip-ipv6only-app.elf:

sections,vmsize,filesize
[Unmapped],0,3924
.flash.text,172,172

Comparing ./master_artifact/chip-bridge-app.elf and ./pull_artifact/chip-bridge-app.elf:

sections,vmsize,filesize
.flash.rodata,-8,-8
.symtab,0,-32
.strtab,0,-96
.flash.text,-100,-100
.debug_aranges,0,-168
.debug_frame,0,-448
.debug_ranges,0,-648
.debug_str,0,-2101
.debug_loc,0,-3661
.debug_abbrev,0,-3707
[Unmapped],0,-3988
.debug_line,0,-9707
.debug_info,0,-40192

Comparing ./master_artifact/chip-pigweed-app.elf and ./pull_artifact/chip-pigweed-app.elf:

sections,vmsize,filesize

Comparing ./master_artifact/chip-temperature-measurement-app.elf and ./pull_artifact/chip-temperature-measurement-app.elf:

sections,vmsize,filesize
[Unmapped],0,32
.flash.rodata,-8,-8
.flash.text,-24,-24
.symtab,0,-32
.strtab,0,-96
.debug_aranges,0,-168
.debug_frame,0,-448
.debug_ranges,0,-696
.debug_str,0,-2100
.debug_abbrev,0,-3697
.debug_loc,0,-3970
.debug_line,0,-9668
.debug_info,0,-40005

Comparing ./master_artifact/chip-persistent-storage.elf and ./pull_artifact/chip-persistent-storage.elf:

sections,vmsize,filesize
.debug_loc,0,2
.debug_line,0,-38
.debug_str,0,-218
.debug_info,0,-250

Comparing ./master_artifact/chip-lock-app.elf and ./pull_artifact/chip-lock-app.elf:

sections,vmsize,filesize
.flash.text,32,32
.flash.rodata,-8,-8
.xt.lit._ZNK4chip4SpanIhE7SubSpanEjj,0,-8
.xt.prop._ZNK4chip4SpanIhE7SubSpanEjj,0,-12
[Unmapped],0,-24
.symtab,0,-32
.strtab,0,-96
.debug_aranges,0,-168
.debug_frame,0,-448
.debug_ranges,0,-648
.debug_str,0,-2219
.debug_loc,0,-4019
.debug_abbrev,0,-4195
.debug_line,0,-9853
.debug_info,0,-69630

Comparing ./master_artifact/chip-all-clusters-app.elf and ./pull_artifact/chip-all-clusters-app.elf:

sections,vmsize,filesize
[Unmapped],0,8
.riscv.attributes,0,3
.flash.rodata,-8,-8
.symtab,0,-32
.strtab,0,-96
.debug_aranges,0,-168
.debug_ranges,0,-576
.debug_frame,0,-640
.debug_str,0,-2219
.debug_abbrev,0,-4021
.debug_loc,0,-4447
.debug_line,0,-8612
.debug_info,0,-65492

Comparing ./master_artifact/chip-shell.elf and ./pull_artifact/chip-shell.elf:

sections,vmsize,filesize
[Unmapped],0,36
.flash.rodata,-8,-8
.flash.text,-28,-28
.symtab,0,-32
.strtab,0,-96
.debug_aranges,0,-168
.debug_frame,0,-448
.debug_ranges,0,-648
.debug_str,0,-2102
.debug_abbrev,0,-3707
.debug_loc,0,-3753
.debug_line,0,-9650
.debug_info,0,-39812