Unused import is not reported

[Ilya-Gh]

Unused import a of static function is not reported if the function is used referenced with its parent class.

Android Studio/IDea does report the import as unnecessary using KotlinUnusedImportInspection:

The following test added to NoUnusedImportsRuleTest currently fails:

@Test
fun testParentPackImport() {
    assertThat(
        NoUnusedImportsRule().lint(
            """
            import A.b

            fun main() {
                A.b
            }
            """.trimIndent()
        )
    ).isEqualTo(
        listOf(
            LintError(1, 1, "no-unused-imports", "Unused import")
        )
    )
}

The error:

java.lang.AssertionError: 
Expecting:
 <[]>
to be equal to:
 <[LintError(line=1, col=1, ruleId=no-unused-imports, detail=Unused import)]>
but was not.
	at com.pinterest.ktlint.ruleset.standard.NoUnusedImportsRuleTest.testParentPackImport(NoUnusedImportsRuleTest.kt:208)

[shashachu]

Re-opening because I reverted the fix, as it caused a couple regressions with false-positives.