Dotty

Backport "Remove tvars introduced while testing normalizedCompatible" to 3.3 LTS #192

Job	Run time
test	46m 26s
test_windows_fast	46m 50s
community_build_a	1h 0m 47s
test_non_bootstrapped	0s
MiMa	4m 11s
test_windows_full	0s
community_build_b	1h 34m 26s
community_build_c	1h 3m 58s
test_java8	0s
test_sbt	17m 52s
build-sdk-package / build	4m 15s
build-chocolatey-package / build	25s
test-chocolatey-package	0s
publish_release	0s
publish_nightly	0s
nightly_documentation	0s
open_issue_on_failure	0s
	5h 39m 10s

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