Run classifier usage checkers after all imports are resolved

Otherwise the diagnostic was not reported on an unused import of a deprecated
class in diagnostic tests, see the test case

compiler/frontend/src/org/jetbrains/kotlin/resolve/LazyTopDownAnalyzer.kt

@@ -209,10 +209,10 @@ class LazyTopDownAnalyzer(
 
         bodyResolver.resolveBodies(c)
 
-        ClassifierUsageChecker.check(declarations, trace, classifierUsageCheckers)
-
         resolveImportsInAllFiles(c)
 
+        ClassifierUsageChecker.check(declarations, trace, classifierUsageCheckers)
+
         return c
     }
 

compiler/testData/diagnostics/tests/deprecated/unusedImport.kt

@@ -0,0 +1,10 @@
+// FILE: A.kt
+
+package test
+
+@Deprecated("A")
+interface A
+
+// FILE: B.kt
+
+import test.<!DEPRECATION!>A<!>

compiler/testData/diagnostics/tests/deprecated/unusedImport.txt

@@ -0,0 +1,10 @@
+package
+
+package test {
+
+    @kotlin.Deprecated(message = "A") public interface A {
+        public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+        public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+        public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+    }
+}

compiler/tests/org/jetbrains/kotlin/checkers/DiagnosticsTestGenerated.java

@@ -6005,6 +6005,12 @@ public class DiagnosticsTestGenerated extends AbstractDiagnosticsTest {
                 String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/deprecated/typeUsage.kt");
                 doTest(fileName);
             }
+
+            @TestMetadata("unusedImport.kt")
+            public void testUnusedImport() throws Exception {
+                String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/diagnostics/tests/deprecated/unusedImport.kt");
+                doTest(fileName);
+            }
         }
 
         @TestMetadata("compiler/testData/diagnostics/tests/duplicateJvmSignature")