Drop support for indexing Scala code #2307

Job	Run time
Docker CLI tests (ubuntu-latest)	7m 40s
Maven tests (11)	5m 11s
Maven tests (17)	5m 22s
semanticdb-kotlinc	4m 16s
Maven tests (21)	4m 52s
bazel_aspect	4m 26s
Tests (ubuntu-latest, 11)	11m 35s
bazel	2m 32s
check	6m 12s
Tests (ubuntu-latest, 17)	8m 53s
Tests (ubuntu-latest, 21)	7m 39s
	1h 8m 38s

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