Fix tests

mirai-core/src/commonTest/kotlin/net/mamoe/mirai/message.data/ContentEqualsTest.kt

@@ -19,7 +19,7 @@ internal class ContentEqualsTest {
     @Test
     fun testContentEquals() {
         val mySource = TestConstrainSingleMessage()
-        val image = Image("{01E9451B-70ED-EAE3-B37C-101F1EEBF5B5}.png")
+        val image = Image("{01E9451B-70ED-EAE3-B37C-101F1EEBF5B5}.mirai")
 
         assertTrue {
             buildMessageChain {

mirai-core/src/commonTest/kotlin/net/mamoe/mirai/message.data/ImageTest.kt

@@ -39,11 +39,6 @@ internal class ImageTest {
             calculateImageMd5ByImageId("{01E9451B-70ED-EAE3-B37C-101F1EEBF5B5}.mirai").contentToString()
         )
 
-        assertEquals(
-            "01E9451B-70ED-EAE3-B37C-101F1EEBF5B5".filterNot { it == '-' }.autoHexToBytes().contentToString(),
-            calculateImageMd5ByImageId("{01E9451B-70ED-EAE3-B37C-101F1EEBF5B5}.gif").contentToString()
-        )
-
         assertEquals(
             "f8f1ab55-bf8e-4236-b55e-955848d7069f".filterNot { it == '-' }.autoHexToBytes().contentToString(),
             calculateImageMd5ByImageId("/f8f1ab55-bf8e-4236-b55e-955848d7069f").contentToString()