overlap between checker.jar and checker-qual.jar

checker-qual.jar contains some classes that aren't annotations and that also appear in checker.jar. Could these be omitted to avoid overlap between the two jars?

org/checkerframework/framework/util/PurityUnqualified.class
org/checkerframework/checker/i18nformatter/I18nFormatUtil.class
org/checkerframework/checker/i18nformatter/I18nFormatUtil$MessageFormatParser.class
org/checkerframework/checker/i18nformatter/I18nFormatUtil$I18nConversion.class
org/checkerframework/checker/signedness/SignednessUtil.class
org/checkerframework/checker/formatter/FormatUtil$IllegalFormatConversionCategoryException.class
org/checkerframework/checker/formatter/FormatUtil.class
org/checkerframework/checker/formatter/FormatUtil$ExcessiveOrMissingFormatArgumentException.class
org/checkerframework/checker/formatter/FormatUtil$Conversion.class
org/checkerframework/checker/nullness/NullnessUtil.class
org/checkerframework/checker/nullness/Opt.class
org/checkerframework/checker/units/UnitsTools.class
org/checkerframework/checker/regex/RegexUtil$CheckedPatternSyntaxException.class
org/checkerframework/checker/regex/RegexUtil.class

Start by inspecting how checker.jar and checker-qual.jar are assembled, then compare their contents against the class list in the issue. Done means the non-annotation classes listed here no longer overlap between the two jars, while the needed annotation classes remain available.