Remove BiMap and SchemaParserDictionary.getDictionary

src/main/kotlin/graphql/kickstart/tools/SchemaParserDictionary.kt

@@ -11,16 +11,6 @@ class SchemaParserDictionary {
      */
     fun toMap(): Map<String, Class<*>> = dictionary.toMap()
 
-    // TODO remove in 15.0.0 (#900)
-    /**
-     * Returns a copy of the entries added so far. If several types share a class, the inverse of the copy only maps that class
-     * back to the first of them.
-     */
-    @Deprecated("Use toMap() instead", ReplaceWith("toMap()"))
-    @Suppress("DEPRECATION")
-    fun getDictionary(): graphql.kickstart.tools.util.BiMap<String, Class<*>> =
-        graphql.kickstart.tools.util.BiMap.unmodifiableCopyOf(dictionary)
-
     /**
      * Add arbitrary classes to the parser's dictionary, overriding the generated type name.
      */

src/test/kotlin/graphql/kickstart/tools/SchemaParserDictionaryTest.kt

@@ -110,20 +110,6 @@ class SchemaParserDictionaryTest {
         assertEquals(dictionary.toMap().entries.map { it.key to it.value }, listOf("B" to Map::class.java, "A" to String::class.java, "C" to Map::class.java))
     }
 
-    @Test
-    @Suppress("DEPRECATION")
-    fun `getDictionary keeps working and only maps a shared class back to its first name`() {
-        val dictionary = SchemaParserDictionary()
-            .add("B", Map::class)
-            .add("A", String::class)
-            .add("C", Map::class)
-
-        val deprecated = dictionary.getDictionary()
-
-        assertEquals(deprecated.toMap(), dictionary.toMap())
-        assertEquals(deprecated.inverse().toMap(), mapOf<Class<*>, String>(Map::class.java to "B", String::class.java to "A"))
-    }
-
     @Test
     fun `input type and object type can share a dictionary class`() {
         val schema = SchemaParser.newParser()