Remove more autotools files

[andy31415]

Problem

Only GN is the current make system in CHIP. There are still some old autotools files in the source tree.

Summary of Changes

Remove more old autotools files and references in README.md

Readme.md may need updates, however for now this PR only does removal.

[github-actions]

Size increase report for "nrfconnect-example-build"

File	Section	File	VM

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

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

sections,vmsize,filesize

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

sections,vmsize,filesize

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

sections,vmsize,filesize

[github-actions]

Size increase report for "esp32-example-build"

File	Section	File	VM

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

Comparing ./master_artifact/chip-wifi-echo.elf and ./pull_artifact/chip-wifi-echo.elf:

sections,vmsize,filesize

[github-actions]

Size increase report for "cirque_log"

File	Section	File	VM

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

Comparing ./master_artifact/OnOffClusterTest.log and ./pull_artifact/OnOffClusterTest.log:

BLOAT EXECUTION FAILED WITH CODE 1:
bloaty: unknown file type for file './pull_artifact/OnOffClusterTest.log'

[mspang]

@saurabhst @hawk248 @BroderickCarlin @jelderton @chrisdecenzo