Fixes warnings

quartz/src/androidDeviceTest/kotlin/com/vitorpamplona/quartz/nip13Pow/PoWMinerTest.kt

@@ -61,8 +61,8 @@ class PoWMinerTest {
 
         val event = signer.sign(template)
 
-        println(event?.toJson())
+        println(event.toJson())
 
-        assertEquals(25, event!!.pow())
+        assertEquals(25, event.pow())
     }
 }

quartz/src/androidDeviceTest/kotlin/com/vitorpamplona/quartz/nip22Comments/GeolocatedComments.kt

@@ -85,7 +85,7 @@ class GeolocatedComments {
                 ),
             )
 
-        assertEquals("drt3n", event!!.geohashedScope())
+        assertEquals("drt3n", event.geohashedScope())
         assertTrue(event.isTaggedScope(GeohashId.toScope("drt3n")))
         assertFalse(event.isTaggedScope("drt3n"))
 

quartz/src/androidDeviceTest/kotlin/com/vitorpamplona/quartz/nip55AndroidSigner/SignStringTest.kt

@@ -42,7 +42,7 @@ class SignStringTest {
         assertEquals(expectedValue, signedMessage)
 
         val message2 = "Hello"
-        val signedMessage2 = signString(message2, keyPair.privKey!!, random).toHexKey()
+        val signedMessage2 = signString(message2, keyPair.privKey, random).toHexKey()
         val expectedValue2 = "7ec8194a585bfb513564113b6b7bfeaafa0254c99d24eaf92280657c2291bab908b1b7bc553c83276a0254aef5041bbe6a50e93381edc4de3d859efa1c3a5a1e"
         assertEquals(expectedValue2, signedMessage2)
     }