[babel 8] Remove babel 7-specific imports #3403

Job	Run time
Prepare Cache	20s
Build Babel Artifacts on Windows	1m 52s
test262 - Prepare for running in parallel	0s
Build Babel Artifacts	1m 17s
Test on Node.js Latest	2m 49s
Build Babel 8 Artifacts	5m 37s
Validate Yarn dependencies and constraints	33s
Test ESM version (23)	2m 17s
Test ESM version (22)	2m 23s
Lint	4m 56s
Test on Node.js (22)	1m 42s
Test on Node.js (20)	1m 31s
Test @babel/eslint-* with ESLint 7.5.0	31s
Test @babel/eslint-* with ESLint 8.0.0	31s
Test on Node.js (18)	1m 34s
Third-party Parser Tests	1m 51s
Test on Node.js (16)	1m 48s
Test on Node.js (14)	1m 42s
Test @babel/runtime integrations	1m 24s
Test on Node.js (12)	2m 2s
Test on (windows-latest)	2m 16s
Test on Node.js (10)	1m 1s
Test on (macos-latest)	1m 28s
Test on Node.js (8)	1m 0s
Test on Node.js (6)	57s
test262	0s
test262 - Analyze results	0s
Test Babel 8 breaking changes on (ubuntu-latest)	1m 42s
Test Babel 8 breaking changes on (windows-latest)	2m 42s
Test Babel 8 breaking changes on (macos-latest)	1m 28s
	49m 14s

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